First off, I'd advise you be careful about suppressing emotions. I did that for...reasons I prefer to not remember, but it caused major problems in the long run. It's great to get along with people, but you have to remember to be who you are too.
Oh, and you don't have to leave a conversation just because you are a lot younger than us, that's the beauty of the fandom, you can talk with just about anyone. Heck, even I'm able to strike up a conversation every now and then
I'm 19 (20 in about 2 weeks) and I have friends in the fandom from 17 to 30something. You'd be surprised how many times you'll find you have a lot in common.
My positive. Quit that job Thursday and won't have to deal with that slug coworker again. Also, moving strong on some of my other objectives with my free time