Me and my ex broke up four days ago I've been trying to get back with her. We dated for 6 months and now she says she loves me but she doesn't know what she wants what do I do?

You leave her alone and move on. You can't make her take you back, especially if she is confused.
Maybe she is attracted to someone else, maybe there were things about the relationship that bothered her. Whatever the reason she has broken up with you. You have to accept that.