Reign: I think you should talk to your other friends about this and about how you feel towards that girl. Let them know that you're bothered by her and hopefully, you'll get to bring this up with the girl. If not, it won't hurt to distance yourself from her. Especially if she's a pain in your ass. Don't put up with someone you don't like just because your other friends do.
Anna: Well... that's a hard one. Maybe what you could do is to talk about it with your friends. Maybe they feel the same way about her. If it's not only you who's complaining that assures you two things. One, you're not delusional. Two, you have better chances of convincing her in changing her ways. Your friends are her friends and they can't just drop her like a hot potato. They care for her as a friend and would want her to become a better person.
"It's like everyone in my batch is in a relationship or at least in the mutual understanding stage. Meanwhile, I've never had any of those experiences. Help me, please!"
Reign: Well, do you want to be in a relationship? Or are you just tired of seeing everyone having one? I think if you want to experience those kinds of things, it's best to meet new people and to get out of your comfort zone, but I suggest you don't force anything to happen. Let those experiences find you instead. I feel like there are more important things to deal with than wanting to have a relationship, so don't sweat it.
Anna: WHERE DO YOU GO TO SCHOOL HOW IS THIS EVEN POSSIBLE? There's a slight chance that you're exaggerating. Not EVERYONE can be in a relationship. Now, if you feel awkward around your friends because they're all in a relationship, then you should talk to them about how they should set aside some time for friends only. Or befriend their partners. The solution isn't to go with the flow and get into a relationship because if you plan on getting one it's never going to be as amazing as naturally getting one. It's going to start looking like a life goal, a responsibility. Like homework where you have to do this and that to keep one. Just chill. Focus on your studies too. Always comes first.