What do you do if your ex who broke up with you is giving you mixed signals

Once you see the person is giving you mixed signals, stop and ask "what do you want from me?" And they should tell you. Be up front and tell them how you feel. For example: "Listen, I don't appreciate how you're giving me these mixed signals. Be real with me because I'm sitting here thinking about you, and you're beating around the bush. Either you're on, or you're off." If this person really wants you, they should tell you. Otherwise, show that you're having a good time without him/her. They will soon realize what they were missing and will find you irresistible!