All you've been doing so far is siding with whichever seems to be popular, you tell us you feel shit about that girl, then feel it, don't pretend to feel good because some else says that single life is good.
My whole job is talking with people, figuring out what's wrong, analyzing their behavior and doing something positive with it. Now in your case the best thing to do is call you out on this absolutely fake behavior, because it won't help you in life, no one will ever trust you as long as you are not being honest with them. I have plenty of friends and I can tell you that they get annoyed by me at times, you know why they are still my friends? Because I'm always honest with them, whether I'm nice, or annoying, they know they get the real me.