Bad Friendships

Heyoo guys,
So do all of you also have kinda "bad friends" like they are nice but not really.
So my situation: I have a friend since 6th grade she always tell me that I'm her best friend and that we should do things together, but she always do it with other people first which I find kinda disrespectful but I'm not that mad. My birthday was on the 2nd of May and she congratulated me almost at the end of the day, again I was kinda disappointed but what can I do? What makes me really sad is that she throws for "our" other friends(they aren't really my friends, I like them but we sadly don't have much in common) birthday parties. Just small ones not that big but for me she didn’t do it once. I thought that maybe she thinks I wouldn't like it but I honestly told her I would like to celebrate my birthday one time like this. Also I'm strangely never invited lol. She invites people who she doesn't like much but me not and she doesn't even make excuses now. But she isn't the only one another friend of mine is almost the same. She moved to a other city because of university but was here on my birthday, but didn't even wanted to see me. She has a boyfriend and just talks about him the whole time. When both of them call me they don't even ask "hey how are you doing?" They just talk about themselves. I know it sounds kind of childish even more when you consider our ages 19-21.
Do y'all also have such "bad" friendship or do you have some tips for me?
I told them many times but the are just laughing its kinda frustrating, I don't want to end the friendships but it's not really good for me.