I'm just overthinking....RIGHT?!?!?!

I'm dating a guy and we both have two kids from a previous relationship. We have been together for just under a year.

I have two girls. He has a boy and a girl.

My girls are 2 and a half and 7 weeks old.

His daughter is 7 years old and his son is 4 years old.

**I know people can be harsh so let me be clear here so I hopefully I don't get slut shamed. You know when you do the math how we've been together for 11 months dating yet I have a 7 week old baby and I would have said it was ours together if it was but it isn't his child and he is fully aware of my sexual assault and has been beyond supportive through court and such. Including the fact that I couldn't bring myself to have an abortion despite the traumatic conception it wasn't my baby girls fault and I love her dearly she was given to me for a reason**

Now that's cleared up. Phew!

I find that my boyfriend really goes silent on weekends...whether or not he has his kids! It's an every other weekend arrangement but I swear come Friday afternoon I dont hear a boo from him til Monday morning on his way to work. And perhaps it's the hormones here. But I swear. Every other weekend when he doesn't have his kids, he's never here, never talking, and his ex (who hates me and is convinced that he had a baby with me and stole him from her despite them breaking up when their youngest was 1 year old) always takes to social media to say lovey things and throwbacks from when they were together. Then come Monday either the post is deleted or he just insists that she's crazy and doesn't pay attention to her in general let alone hang out with her. Shrugs. I'm not even mad just thinking....probably overthinking trying to find a logical answer that's i guess better than the ones he gives?!