You said it yourself, she is being selfish. Pick up her calls, talk to her and let her know how much it pisses you off. She seems to be
EXTREMELY CLINGY, which could be unhealthy. Tell her everything you wrote in your post, how you were there for her and whatnot, it isn't like you don't want to see her, it is because you CAN'T. And even if you did want some space, that'd be normal too.