<human>: Can you condense the text into three sentences or less?

long story short, my ex, we'll call him Jack, dated for a short time and broke up a year ago. We dated long distance so we did not see each other. 

Recently we hangout at a party and Jack ended up staying the night. Our hookup in the morning was completely **sober**, and he was acting like we were dating when he was over. 

However, when hanging out with others during the day he was really awkward and we didn't talk about it. And, since he left yesterday, he hasn't texted me at all, even though i sent him a text. 

Since we broke up he has had a history of hookups and such, but he just seemed like his regular self with me again. Some of my friends believe it didn't mean anything, but others think a sober hookup is fishy, and I'm wondering, should i leave it? Or should i ask him what he wants to do about it? even if he's not interested, i would like to know. 

I'm not even certain if he wants to be friends!
<bot>: ex boyfriend and i hooked up this weekend after a year hiatus of not hanging out. Should i ask him if it meant anything and if he wants to continue?