Should I stop talking to my supposed "friends"?

[Bellatrix Lestrange Suspended]

I'm 17 years old in HS, and friendships in HS are bad enough as it is, but I can honestly say that my "friends" have never been there for me. They never invite me to any of their little gatherings. I'll go on instagram, twitter, or facebook and just see pictures of the group, without me in it. They don't even invite me when I'm always there when they need help.

For example, in IB Psychology, I actually do my homework and I study for tests and essays. They don't. Sometimes, they'll call me at like 10:00 pm and I'll literally spend 2 hours explaining stuff to them, giving them my ideas, and whatnot but they don't do anything for me. When our teacher told us to prepare an outline for the 10 paged paper we'd have to write in class. They just asked me to send them my outline. They never do anything for me though. For example, for my birthday, they didn't get me anything. But for each other's birthdays? They stress over which lotions to buy each other and whatnot. I just feel like they only hang out with me to get A's on their tests, and then I'm good for nothing after that.

[Valentina]

those aren't friends. You should stop talking to them.