What would you do if you where me?...honestly..think about it!?

There is this guy and I started talking to him at my friends party. He wasnt talking much to anyone so i decided to see what was up. I wasnt trying to flirt with him or anything but we ended up talking for a long time untill ppl interupted us. When he left he gave me a hug goodbye. We never really talked much in school before that and after that incident he says hi but that is just about it. Now i havent been able to talk to somone the way i talk to him in awhile and i dont want to p that up. OoO and by the way we dated the year before but we were both very immature and we've changed alot..for the better. and we only dated for a week. What do u think i should do??