What's your take?

So me & my daughters dad have technically been split up for two years, but before our daughter became part of our lives we were together for 4 years. February of 2018 through the end of June 2018 we hung out nearly everyday as if we were together, even discussed moving back in with eachother. At the beginning of July I found out he moved in with a girl he just started dating in the SAME day. I was given no explanation, no heads up & still to this day no apology for it. Even though we were never "officially back on" that shit cut deep. Relationship wise I have not moved on & met someone that I feel deep in my heart could be the love of my life. I still feel it's him & always will be. A month into his new relationship he announced they were expecting a child together. She is now due next month. We have a visitation set up so he can have his time with our daughter, recently every time he both picks up & drops our daughter off he stays an extra 20-30 minutes visiting with ME. This morning during pickup he asked me if I was pregnant & then pulled at my shirt, jokingly I said yes then immediately followed it with a "hell no." I also have my nipples pierced, obviously he is aware of this, but he made a random comment to me about them this morning... Why would he care if I'm pregnant when he has a girlfriend who's about to pop at home? & what's up with that comment. He hasn't seen them in months? Since he's started staying a little longer, he talks to me about random stuff, anything from our daughter to things circulating on Facebook, but never 'inappropriate' things or comments. Another thing I found weird was he actually hugged me for the first time when he was going to leave?? Other than the nipple ring comment, maybe this is just all normal & I'm the one over thinking this whole thing because he's still the one I see myself with.. of course I'd NEVER let anything go too far with him having a girlfriend, especially one that's pregnant. Idk guys. Am I just being blinded by love again or does this sound kinda weird to you guys too? I mean, would you guys want your boyfriend being like this with their childs mom? I get conversation & getting along is healthy for coparenting, but I feel this is a little more than him just trying to get along for our daughter.