Hi there,

Wow, sounds like a frustrating situation. She probably has no idea how selfish she is and she is perhaps rather emotionally immature to be like this with you, maybe try to bear in mind that the normal "give and take" in a friendship is something she doesn't understand? So try not to take it personally. Before taking drastic action and ending your friendship maybe consider writing her a letter explaining how you feel. If she is a true friend she will want to work things out. Hope things work out for you.