Am I overreacting?

So, I recently got back in contact with my sons biological father. He’s married and hasn’t told his wife about our son yet. He blocks my number when he’s home and sometimes I don’t hear from him for days or even weeks. It irritates me because if he doesn’t want to be a part of this kids life then why not just say so? He says he wants to be a part of his life but he doesn’t even bother to call and see how he’s doing. I just don’t get it.

Just a little update: his wife knows now, paternity test to come soon and filing for child support soon after. I wanted to thank all you ladies so much for giving me the push I needed to do what needed to be done. It means so much to me.