Overthinking is killing me!

I was never close to my parents as they never understood me. 3 failed relationships broke me. Now this covid has led me to anxiety. I am suffering from anxiety (probably because I am an overthinker) from last 1 year or so. Luckily my friends came to my city and I used to visit them once in a week. That was my happy place, my escape from my dark & empty world. But suddenly things changed, my one of the closest person left me, broke me in many many ways. Also, my parents locked me up at my home and are not allowing me to come out from my room. I am all alone and now overthinking is killing me! Every day. Every Night.