Some people are bad enough that I’d rather not have them involved with my children at all. This guy clearly needs some serious work, at the very least. My guess is he is unhappy in his other relationship(s), enough to start that with you. But he’s also not being his authentic self with you, so even if you ended up with him, even just as the child’s other parent, you’d have a piece of work to deal with. So, I’d probably be trying to assess for myself what kind of person he really is, and what I want to do about that.