Opinion please?

So this guy that I live with, we’ve been having sex this past 4 months. Just 2 adults having sex. The last time we had sex was mid December. He went on a trip for a week and when he came back I went on a trip . So we hadn’t had sex nor talked to eachother for 2 weeks. I came back and we would see eachother around but hardly talk. We usually would get together at least once a week. One night I texted him, while he was out, to see if he wanted to hangout when he get home. He replied to me once and that was it. He end up didn’t come home that night. So lately we been bumping to eachother and usually we would talk but after the 2 week where we were both gone it became different. It feels really awkward for some reason. And now it’s been 4 weeks since we’ve haven’t hung out with eachother. I’m a little curious why.? Idk if maybe he started talking to some girl and just wanted to stop hooking up? But i felt like if he was to start talking to someone, I think he could have told me? Right or no? Should I ask him if we’re still hooking up or should I just leave it alone and just don’t text him anymore. it’s kinda sucks because I did catch some feelings for him. what should I do ?