Does this sound like what I think it is

My son is 2. Just throwing that out there. His father basically quit coming around a lot once he got his new girlfriend last November. He would still come every once in awhile, but barely ever. Then once it hit May he quit coming around all together. The reason why? She was pregnant with their little boy. So basically he didn’t want anything to do with our son once he found out he could have a real family with her. So we haven’t seen him in months and I haven’t talked to him since August on the phone.

Now he has her moved in his house just like he moved me in after our son was born, and is taking care of her and their son. But won’t acknowledge our son.

He has me blocked on every form of social media. (I think it may be because of her.)

I decided to turn one of my old IGs (that we were still following each other on) into a spam account because it’s fun and that’s the new thing.

I posted one picture, ONE of our son just talking about how beautiful he was, and the dude unfollowed me! Just because of a picture.

Why? Does he feel guilty? Is he really trying to just act like our child together doesn’t exist? What did the baby do to deserve this ya know?