As someone who had a similar situation when I was younger, I can't recommend deleting social media like Instagram/Facebook off your phone enough! That shits going to mess with you non stop with basically zero upside Instagram posts will only show the best of what your peers experience and captures all the high moments of their life while omitting everything else, Do not compare yourself to them or their lives, it literally provides you 0 benefit. Focus on yourself and improving your life, find hobbies, interests and Activites that you're interested in and expand on that, after that the you'll be surprised how much of a positive impact that'll have one your life. If you like a certain video game? Join a community for that, talk to other people (can be just on discord text) maybe you play with them and explain you have a stutter, people aren't evil, most people who make fun of us just don't understand, it doesn't come from a place of malice. You as an individual are capable of so much more than you think, don't waste your energy on focusing on other people wishing you could be like them, do what you can do and go from there!