Please someone help me, I'm lovesick:(?

Ok there's a guy I guess I've been "talking to". He flirts with me alot and always wants to chill with me but then he hasn't kissed me and he's had so many opportunities. It's not because he's inexperienced because he's had sex with other girls in the past. Why is he not kissing me? Also he'll hang out with me for like 3 days straight then randomly skip a day and doesn't talk to me at all. What's going on?! And what should I do about it?!