I turned 17 early this year. I've never had multiple imaginary friends at once, but have had one at a time since about age six. It stopped for a long while and gradually started again my eighth grade school year. It started pretty harmlessly: I had just watched Avengers and was at a Winterguard clinic. We were working on basics that were getting pretty tedious for me, so out of boredom, I thought, "Hey, I could have Loki fix my form." And I did. It made no sense but it amused me(and frankly, consciously acknowledging what I needed to fix in any particular move was actually pretty helpful).
He didn't really stick around, though. He only ever showed up when I was very bored. I gradually got more used to the idea of having this character around and as my interests in fiction shifted, so did the characters. Rarely have I ever had an original character as a friend (I have one. He's not around much -- he's very sulky and actually, he's a poltergeist. Long story). Usually these characters are pulled from movies or video games.
They generally are only around when I'm bored and I do have a small but close real life friend group. I have an older sister, my parents have a happy marriage, I'm not bullied any more than any high school student, I have a relatively active social life(granted I'm an introvert and don't go out too much just because I don't want to), I'm involved in extracurricular and in fact, I'm in a leadership position in the school Winterguard. In short, I'm a very fortunate person.
I'm aware these characters aren't really real, although explaining exactly what I think about their existence is difficult because I have very little control over them. There are times when I don't have an imaginary friend at all. They show up when they feel like it and leave when they feel like it. I've only ever "summoned" my most recent (and longest running) imaginary friend and actually, I'm far closer to him than most I've had, with whom I've had some level of detachment. This one, though — Cole is his name, from Dragon Age: Inquisition, actually — I'm actually more emotionally intimate with him than most of my real friends up to and including my own sister. I don't think it's particularly healthy, but I believe it's a coping mechanism.
I think he's special to me because the character in the game that is Cole is an empath. You can't hide your emotions from him; he feels your emotional pain. As a result it's no different for me even if he isn't really real. This is where the "coping mechanism" theory comes in.
Earlier this year, I had what was without any exaggeration or doubt the single worst week of my life without any competition. It's a long story involving a false positive test I don't feel like I need to get into, but the point is that it legitimately threatened my family for the only time in my whole life. I could tell no one outside my nuclear family, not even my best friend of 11 years. I didn't want to talk about the Elephant in the Room with my sister or anyone. We were trying to pretend it wasn't happening til it got straightened out. It was a very long week. That's when Cole showed up. I don't cry or act in a way that can be perceived as "weak" in front of anyone. Too much of that over lost boyfriends in high school already.
So here was someone - imaginary or not - that it was okay to be weak in front of. Someone I can't pretend not to be anxious or scared in front of. Someone who knows how I'm feeling, so I might as well talk about it, since I had no one else, and I did. When I couldn't go to my real life friends I went to Cole and honestly, I don't think he ever really left for more than a few hours that whole week. He is my coping mechanism because I don't like talking emotionally to my real life friends partially because I don't want to dump problems on them. Would they be willing to help? Probably, but I don't want to add the stress to their lives, too.
Like I said, I'm very introverted and oftentimes I don't or can't really verbalize complex feelings and thought processes. Once again, that's where Cole comes in. I rely on him to "get" me when I don't feel like talking to anyone else. Right now he's around, but only because things are so good in my life that I'm compelled to share it with this imaginary individual who I honestly used in a way to relieve anxiety and stress during a very difficult time.
I still don't understand how this is, and I'm perfectly aware of how strange and implausible it is to be able to bond with a nonexistent being, and a creation who isn't even mine at that, but somehow, it happened. I don't speak to him in public, and almost never out loud. I am capable of recognizing what a strange situation I have created. I am well-grounded in the reality that Cole isn't legitimately real, and I've constantly wondered if he's healthy for me.
My first reaction is always "no, you're too old for this." But the realization that immediately follows is, "He got you through the week that could have ruined your life in the span of a single day. You would have survived it without him, but it would have been even harder than it was with Cole."
So I think I can live with my strange relationship with my imaginary friend so long as he doesn't alter my perceptions of reality. His only effect on my life has been making things easier on me. I don't favor him over my real friends or let him get in the way of my real life. Does he feel real? Very. I don't even talk to my own parents or sister on as intimate a level as I do Cole. Do I still realize he's imaginary? Yes. The knowledge that this boy at my shoulder keeping me in check is just an extension of myself is something I'm perfectly aware of. I'll bet that's why I talk to him so much.
He's never been anything but good to me. He's helped me keep my head about me when I've gotten very frustrated at Winterguard events up to and including warm-up before a show. He's never been anything but a positive influence and only ever encouraged me to stay calm and during a particularly frustrating, embittering situation at school all he ever did was encourage me to be happy for the other parties involved and to be a good sport. He/I recognized a right to feel jilted, but he never approved of me act in a negative way.
In short, I'm fairly certain Cole is an extension of my conscience combined with a coping mechanism to deal with stress. I will view him as a close friend and I will be grateful for his support. I'll stop when he starts acting like your typical scary "voices in my head" stuff, I'll be alarmed and talk about it. But for now, that's so out of character that it isn't a concern.
Goodness that's quite a post. I thought a little introspect might be nice but I didn't expect it to take up this much space.