feeling down

I'm kinda feeling tangled right now and I am juggling so much that I am starting to feel myself shutting down. I have friends who treat me more like a therapist than a friend. I have been searching for a job for months and its a dead end. I wanna go to college but my parents won't pay and I don't have the job or money to go. and now my sister won't let me talk to my friend that used to be my best friend and is now my sisters best friend and I know it sounds stupid but it's taking a toll on me. we used to love being together and now that they are best friends my sister is pushing me out. my boyfriend wants me to just let go of people who are not doing anything for me to move forward but I'm not someone who just drops people like that.i just want be a good person and friend to others but it's really starting to affect me and i don't know if I can keep up anymore if you read the whole thing thank you I really appreciate it cuz at this point I don't know what to do anymore I have terrible anxiety and I'm not medicated at the moment. I want to make everyone happy but my boyfriend says that can't really happen that I have to start being selfish. is that true?