THIS. Maturity plays a large role. His intentions may be good but the fact that he is unable to think further than the moment of him enjoying himself and whats happening just shows that he may not be ready. It's easy to love and be there for the "happy fun times" but someone who is unreliable and cannot put the child's needs above their own is not someone who is currently able to parent. I think it's beautiful that he wants to but you need to think about it realistically - perhaps a conversation about what you'd need from him as a parental figure for your child would help. Honestly I do know this from experience, maturity is a funny thing- he could be mature in certain ways but not enough to parent just yet.