I don’t know what to do

I love my friends so much, but they’re all drifting away from me. They never respond to my texts, call me annoying and clingy all the time, never invite me to things, and when I invite them they either don’t respond or say they don’t want to. The only time one of them does is when we go see movies because she can’t afford to see them and I usually pay for her. I’ve started to like school more because it’s the only time I get to see them, but only for a minute or so because they aren’t in my classes. I don’t know what I’m doing wrong. I do my best to be kind and do whatever I can to show them how much they mean to me but they just think I’m annoying. At this point, I only have one or two friends left and I’m so scared I’m gonna lose them too. My anxiety is getting so bad. I hate how they feel obligated to pretend to be my friend and it makes me feel so alone. We all used to be great friends but everyone is slipping away. Sorry for the long post. I just don’t have anyone else to talk to.