@hallenotberry not slaggy at all! All I will say though, is even though right now you might not want him to be your boyfriend or the other way round, just be careful because feelings do tend to creep up on you!
Otherwise I say go for it!! ?
I don’t think you’re being stupid at all. When you love someone it’s hard to forget them no matter what they’ve done.
I think before you do anything, you should be 100% certain that he is getting the help he needs. If he has an addiction then he needs to admit it and seek the appropriate help.
I think you should tell him that if he’s serious about getting back together with you, then he needs to prove it. Especially as you have a child together.
Until he has been able to do this, then try your hardest not to let him fully back into your life, however, you can be there to support him if you want to.
I hope that makes sense!