How much contact should your boyfriend have with his ex?

I'm not quite clear on how or why you broke up. Was it because you were concerned that he was spending time with his ex because of having a baby with her? If he's calling you & telling you that he misses you, then it's evidently you that he probably really wanted to be with you while the two of you were still together. That would be my guess. I think that if he is going to spend time with his ex and their child, that he should have clear boundaries on how much time to spend with her and with his child. Personally, if she is his ex, I don't think he should have to spend much time with her at all. I would think that the child could visit him where he lives or that he could take the child away somewhere for the day without having to hang out with the ex. I think that when you're in a relationship with someone that you need to be careful about spending time with the ex and that you need to be sure you aren't giving your current partner the wrong impression (as he evidently has done with you). I think the person you're with at the time is the most important person in your life, and that you need to protect that relationship, whatever that means. I also believe that there are ways to get around having to see the ex. I think that a lot of guys allow their ex-girlfriends/wives to control their lives, and I don't think this is right. I think a man ought to be able to see his child without the game-playing and threats from the exes. I think the women ought to be more mature as well, however, I have seen that they tend to use whatever ammunition they can to try to get back at the men in some way, which is normally through socking the guys for high child support or using the child as a pawn in whatever games they play to try to get back at the men. I know this is totally not right! I know that these women know it's not right as well! I think that if they want to get knocked up in order to keep a man, that they ought to take responsibility for the fact that they tried to use a man to get knocked up so he would stay with her and realize that it didn't work and it's never going to work, so why take it out on the child? I just think that's totally wrong! Of course, dudes can be pretty stupid when it comes to falling into these traps and games that some women play in order to get a man and try to keep him through manipulation and then if he doesn't stick around, she decides to sock it to him. I think that we as men tend to think with our penises so much, and it tends to get us into trouble! Guys, wise up! These are my personal opinions.

you need to be mature when a child is involved because even if he does not have feeling for her is always going to be involved with because of the child you just need to have trust in him.

Well, if he's got a kid with his ex, he can spend as much time with her as he needs to, for the child's sake.