Fwb and mixed signals

So I'm in a fwb situation. Neither of us have ever been before so I'm learning as I go. In the beginning, about 3-4 months ago we agreed, no strings attached sex and basically continuing the friendship that we had.

So heres what a typical visit looks like: he comes over and usually we watch an episode or two of something on tv. Tonight, he laid on my chest and snuggled into me while we watched tv. Then we usually go to the bedroom and in between rounds he will lay with me, talk and tell me about his life. One of the previous times I had started rubbing his back and now he asks me to do that because he enjoyed it (didnt get much affection growing up), so I do because I like seeing him happy. When our visits are at night, he will usually fall asleep next to me for an hour or so. Then goodbyes are delayed because he keeps talking and telling me stories about his son and his family growing up.

I asked him why he wanted to start this with me, why he continues doing this with me (because after the first couple of times he said it was the "last" but keeps coming back), and I made a comment about him trusting me tell me so many stories. His responses were pretty generic and guarded. He doesn't really like feelings and has been going through a tough time with his kid.

I'm not going to say that I'm in love with him, but feelings may be brewing inside me and I'm not sure if I should bring them up and see if they are mutual or not. The sex is honestly amazing and I really enjoy our physical connection. I just feel like what is said and how he displays with me physically are two different things

Edit: many rounds 😏

Edit 2: I'd also like to add that we have a large age gap. He also has a son which I dont mind, I think hes a great dad. In past conversations hes laid out things an ideal partner would have and I meet most of that criteria except that I'm younger. He also used to tell me to "not catch feelings" but that comment hadn't been made in a while. We do work together and he spent all day yesterday basically.hanging out in my office and has done this in the past. Last night he was with me from about 9:30p-4a. I enjoy him being around, when he is around it isnt only sex. Hes been here before without it. I'm afraid to mess this up. Like I said, I don't love him. I really do like him, I could see a relationship outside of what this is now but idk about him. So many comments were made in the beginning of this, but it feels like things have evolved. I'm okay right now with what's going on. I dont want to lose him or scare him away with feelings about our relationship. I know it sounds awful but I'd rather continue this and be somewhat oblivious than lose him and get hurt in the process if that makes sense.