Don't quit mate. I'm currently in medical school and trust me, i know that look people give you when you stutter, they treat you as mentally impaired or pity you, i absolutely hate that feeling too. But I'm glad that as I went on with college, i found a couple of friends who accept me for what I am and don't judge me on the basis of my stutter. You do you, and think of it as the other person's loss, if they don't wanna talk to you, fuck them