I'm sorry this happened to you, used to happen to me all throughout highschool and university. Now I'm working and don't really have a social life outside my work. What I can say is, you'll start to accept the stutter or speech block one way of the other. In a sense I see it as a blessing. I used to see my stutter as a hindrance in my life. Maybe it was but God gave it to us for a reason, or a way to build us rewards every time we struggle to speak. It allows us to not just ramble stuff like everyone else. Gives us more introspection into our own lives. Not following the sheep but go our own path. Sometimes I feel like even if I have no friends. Who needs them when you have god on your side right? Best wishes and keep fighting!