Is he getting comfortable or pulling away?

Joe and I have been casually dating for the last 3 months. He just got out of an abusive relationship and told me from the start he isn’t ready to get back into another relationship yet. I’m fine with that because I have some things I need to work out for myself too. Although we’re technically not in a “relationship”, we text each other every day, text good morning and good night, go places together, hold hands, hang out multiple times a week, make out, hook up, cuddle, talk about pretty much everything, and we’ve both told each other we’re not seeing or sleeping with anyone else. Over the last month, sex has been different too. In the beginning, it was more like hooking up – just sex. Now, it’s much more intimate and passionate. More kissing, more holding tight, more cuddling. After after, he holds me close and I put my head on his chest and he wraps his arms around me holding my head and stroking my hair. It’s starting to feel like a relationship is developing. He told me about 2-3 weeks ago that he does really like me and that he wants to have a relationship with me in the future, when we’re both ready. And I told him I feel the same.

In the last few weeks tho, I’ve noticed a few differences in him. He’s skipped sending a good morning or good night text here and there. And we’ve only hung out 1 or 2 times a week. We used to hang out 4 or 5 times a week. When we’re together, everything seems like before. There is still the closeness and feeling of a relationship developing. It’s just the hang outs aren’t happening as often, and we’re not texting as often throughout the day. He still texts daily, he initiates contact, and makes plans with me. The only difference is it is all less often than before.

Is this normal? Is he just settling in and getting comfortable? Or is his pulling away? Is this something I should ask him about?