I think if you want to get back with him and you want this to be a proper relationship there’s no point going into it saying you can’t tell him the reason you broke up.
if you can’t talk to him with the confidence that he won’t “cause trouble” when you’ve told him something (no matter how angry he might be)
is it really a relationship you and your kid need, and it’s not fair on him either
you have a child with your ex, both men will be in your life for now, like it or not.
maybe talk to your friends or a family member who knows the ins and outs of the situation.
if you can’t talk to him with the confidence that he won’t “cause trouble” when you’ve told him something (no matter how angry he might be)
is it really a relationship you and your kid need, and it’s not fair on him either
you have a child with your ex, both men will be in your life for now, like it or not.
maybe talk to your friends or a family member who knows the ins and outs of the situation.