Man, I want to hug you so hard. I’ve been through that phase with almost the exact things, and it wasn’t getting better. A really big positive breaking point in my life was when, around 19years old, I started to get f*ing fed up with all that things I had to deal with, and started not giving a shit about my stutter. I’m guessing some mental wall broke down in me, after that I started uni, met a ton of people in just one year and has been talking ever since. I’m still stuttering, but there haven’t been blocks or those typical “wtf” moments from other people since too long to remember. I’m not even scared to give my phone number to someone now! Don’t let yourself sink, and even if it sounds stupid, embrace all of it and don’t give a damn about what people think.