That meens she doesn't want to go on with you but she also doesn't want to hurt you. Forget her and look for a better one:) She can be trying to ditch you with out hurting your feelings. She could be doing something behind your back that she's feeling guilty of. She could have low self esteem and be a drama queen and want you to dote on her and make her feel better about herself. You need to ask her directly why she feels like that. Say something like. "Can you tell me why you think I am too good for you" depending on her response you will figure it out from there. Come out and ask her the things I mentioned. If she is any kind of decent person she will be forthcoming with you and stop wasting your time.