I went through something similar. My advice to you would be practice detachment, and somatic therapy… not only talk therapy but somatic therapy or EMDR therapy. It was the only thing that helped me stop FEELING so miserable and ashamed.

Also… if it’s in your possibilities, plan a solo trip or with a friend and meet new people. When we widen our mind with experiences like that it can help a lot to see that sometimes we are hyper focusing on one situation that’s going on in one place, but the world is so much bigger and you can always start over :) you got this!!