I used to have a crush on this guy, who started having a crush on me after i got a boyfriend. Unfortunately, I was too in love with my then ex boyfriend and instead of trying with this guy I got back with the ex. Now that the ex and I are no longer together, I have once again developed feelings for this guy, but I don't know if he's still interested. He's giving me really mixed signals. He's either really flirty and touchy, or completely not interested in what I'm doing, almost avoiding me. What do I do?