Stuttering

Soooo my boyfriend stutters. He was in speech class most of his life and ended up being in the small minority that the stutter doesn't go away. 
When we first started talking it was hard for me to adjust to it but now it doesn't bother me, but I feel bad for him when it happens in public and he gets all caught up. 
I also found out that stuttering is hereditary. I can see myself marrying this man but I am so afraid that our future children could have this problem. 
Anyone on here have a SO that stutters or anyone on here that stutters? I know it's such a small percentage. Anyone know of anything I can do to help him? He gets so frustrated and he hates it and it breaks my heart. He's such a good man.