Been with my gf for almost 3 years, I'm 17m and have had a pretty bad stutter for all my life so far and the only thing I can tell you is that it depends on what type of person your partner is, if they really love you for who you are then there shouldn't be a problem My gf knows about my stutter and understands me, she's one of the only people I'm not afraid of stuttering in front of. When we're talking and I have a block and start stuttering, she just waits until I say whatever and then the conversation continues. She doesn't rush me, she doesn't look at me weirdly, she doesn't tell me to "calm down" and "relax"(as good as that sounds we know it's the worst for us when someone says that), she just waits as she knows in a few seconds I'll be able to say what I wanted to. Even though it doesn't affect her I still do feel bad sometimes, sometimes I just want to be normal and be able to talk to her freely without rephrasing things sometimes for my own sake of not wanting to put up with a block. But yeah, a stutter shouldn't affect your ability to be in a relationship. If it does, it wasn't the relationship you're looking for