well first i believe you need to take care of the part where you,"say something stupid"...i delt with this issue alllll the time probably way worse then you. I was considered socially awkward. so my social skills consisted of making others feel uncomfortable around me. So yea i said stupid things all the time. it was really weird and i hated it. So this issue should get taking care of and i believe that once that is taking care of, youll find a lot of peace inside of you. A LOT. So in order to do this you need to start at the core or the bottom. THE DEEP stuff. The stuff that are deep. The reason why doctors and therapist say their deep is because they are hard to find! We search and search inside ourselves and find nothing! Thats why they move to the next step and say why dont you just start serving people or getting motivated. yes these are techniques that could help. If you want try to accept the good and bad of you. In order to do this first. YOU NEED TO START SHOWING OTHERS UNCONDITIONAL LOVE. your mom dad brother sister co-worker that you hate, anyone that you hate, people people peopl. People that you judge to be weird or nerd or jock or w/e your case is. Show other people unconditional love all the time, then show yourself unconditional love