I need opinions

My ex and I broke up in April. He would come to see our daughter once a week on a Wednesday and then have her over his house on weekends. I always had hope we’d get back together but those hopes disappeared when he got with someone else in June. I don’t know how his new relationship is going now because I blocked him on social media and obviously we don’t speak about it.but I have this gut feeling the grass wasn’t greener after all, recently he has started messaging me (not daughter related stuff) just like he used to, just general chat and as the weeks have gone by he’s been staying longer each visit, he used to just pop in for 15-30 min but now stays for about 1-2 hours every week. The weekend just gone was my weekend to have our daughter so I wasn’t expecting him to call around but he did! He called in on Saturday and stayed for a while, then came again on Sunday which is out of the ordinary for him. While he was here he was talking about stuff just like the old days, now he’s just messaged me to ask how our daughter is doing and that he’ll see her Wednesday. I explained that his parents wanted her Wednesday for a few hours because they haven’t seen her for a while so he said he’ll go to their house to see her, but also that he wants to come over on Thursday. To most of you, this will seem like nothing and he’s just being a good dad and being civil to me, but we had a bad breakup and I feel in my gut there are some ulterior motives here, but obviously I can’t be 100% right. It just seems a bit weird to me because this is not the norm of what we’re used to, and when he comes over he spends most of the time chatting to me. I dunno I just feel like he’s realising what he threw away when he ended our relationship, he even messages me when he’s got our daughter over his house for the weekend and they’re not messages about our child?

In reply to Jess- that is something I would never do, even though he did it to me….with her, when I said he got with someone in June, that is when I found out, but it was going on longer

Lulupie- the hurt and bad feeling were on my part, he did the hurting, I hope he is being better at co parenting but I can’t find the right words to explain what I want to say, it’s like this feeling I have.

I don’t think I want him back guys so I’d never go after someones man, I would love to have our family unit but romantically and sexually I couldn’t see myself with him again, not now that he’s been somewhere else. The way we broke up was sudden and horrible and I struggled, and now it seems like he’s realising the shit he put me through