In or out of life

The person that I had sex with (ex boyfriend & baby daddy) didn't believe that this kid is his. It IS. It's impossible to be anyone else's. I told him to forget that I even said anything to him about it. Talk to him about it once again or try to (he will probably ignore my texts), or just wait until he says something. Don't know what to do, he's so confusing. And the baby is his, for a fact.