I feel the same. I have said "No" to many opportunites, opportunities which are life changing. I'm 20 years old and this is the perfect time to say "Yes" to every opportunity I get, but I cannot simply do it, my social anxiety and stuttering is what keeps me locked up. Seeing people succeed on social media is making me depressed because they don't have the problems I have. But in a way, it's what made me here today, maybe I could've been somewhere else this second while I'm typing this comment, maybe I could've been a professional football player, who knows. Everything happens for a reason in life, we just have to be a better person than yesterday.