Will he make a good father

I have been in a relationship for 2 years. I have 3 kids he has none but wants us to have a baby. He helps take care of my kids but doesn't really show love did them. My question is will he be the same way with a child that is his and am I willing to stay in the relationship any longer and hope he loves my kids and a new one if that happens. I'm just so unsure of what to go here