when is it a good time to tell a gy you want more commitment?

Ok guys this is a hard one, I need some advice about this situation I got myself into.. So to make a long story short I meet a guy at a halloween party we click and I think it was like 4 days later, hes at my house and we sleep together. I know not a smart move on my part, but my mindset was I didnt want a relationship ( I had just got dumped 2 months earlier and didnt feel like going through heartbreak again) I just wanted to get laid I guess.. So we started sleeping together, which was fine just sex no other crap. But then he invited me out to a party with him and his friends, he was all over me infront of his friends and then last week we went to another party and he introduced me as his girlfriend a few times.( Now I dont know if it was because he had been drinking) But we left the party together and pretty much everyone knew we were leaving toether.. He was pretty tipsy at the party so I dont know if I should bring it up. Anyways the biggest problem is as much as I keep teling myself I dont want a relationship, I do… Now that we’ve hung out hes got me waiting for him to call, wondering what hes doing, basically just thinking about him!!! and its exactly what I didnt wasnt to happen. So should I continue this relationship and keep sleepng with him if I know I know im starting to have feelings for him? or should I be straight up with him and see if he did mean to call me his girlfriend? ( and if youve read the whole thing thanks!! I dont have much girlfirends to talk to..)