\-Don't look away when he stutters, he might look away (I do that when I stutter, I lose eye contact), if he does, don't look away! \-Don't smile or like nod or anything like that, it might seem supportive, but i mean just look at him as if he was speaking fluently, as if you don't notice the stutter, you're just hearing him - speak. \-Try to be in a "uplifting" mood to calm his anxiety if its your first date, i mean like talk about yourself first, so he can then follow up and talk more, relate and the conversation flows more! \-If he ever brings it up, listen! It's a super sensitive topic for him, ask him questions if you have any, its going to ease him in a bit more when he explains whats going on \-About not finishing his sentences, if its your first date(s), he won't like it. But i have been with my boyfriend for a long time now, so at times, I'm actually happy when he finishes my sentences, because i'm not feeling it today for an example, if you really like him, it gets easier once he gets comfortable,! ​ Have fun and enjoy! He probably has a looooot to say in his mind! So just be patient :)