She either has some hormonal problem, or is just being desperate.

Sit her down and give it to her straight that she is pissing you off with her boy problems, she doesnt need a guy to be happy and maybe tell her to grow up a little. I have a friend who is exactlly the same, and I really cant be bothered with her anymore. But its always that her mum hates her boyfriend and she makes up all these stories that arent true to get sympathy. Its pathetic and almost everybody hates her but me. I wouldnt call her a friend anymore. Just an annoying person I know. I dont hate people.