People find many things funny that they shouldn’t laugh about. Not sure if you’ve ever laughed at someone’s insecurity, but if you have, they probably felt the same way you did. It sucks to stutter, I’m a stutterer myself and I have begged God to treat me, I have wanted to end my life many times because of it. As you get older, you start caring less about what ppl think. You’ll get there. Go to therapy, start setting up smalls goals for yourself. I recently posted about how I ordered from a drive thru for the first time in my 31 years of living. I had that goal for a long time and I finally accomplished it and now I feel confident to do it again. All it takes is confidence, and if you fail, try again. You cannot succeed without fail, and just trying, you’re already succeeding.