Not here to went, but I will share with you my life journey in hopes that it may inspire and help others to overcome their darkest moments.
When I was a kid, I was extremely shy and filled with anxiety. To the point of not being able to hold a conversation with anyone else but my parents. It was really unpleasant, I could not even go to a store and was constantly bullied throughout the whole time I was in school. People that were my "friends" were bullying and making fun of me.
But, at a certain moment, something changed. I realized I don't need these fake friends that were bullying me. I completely dropped everyone from my life and focused on improving myself. Each day, little by little I became more confident. I trained my mind and body in complete isolation. The only people I would interact with were my parents, but even then just for essential matters. Video games and anime were my only companions in this period. It may seem childish, but I learned a lot from fictional characters and helped me develop. Some of them served as my role model (Zack Fair from Crisis Core Final Fantasy)
This took me many years, but eventually I got at a decent enough level that I could take care of myself. I have gained some confidence and self-esteem, but along the way I lost the ability and will to make new human connections. But slowly I have been able to make new friends and generally better connect with those around me.
TL;DR: Moral of the story is that if someone like me who had 0 confidence and was bullied constantly for half of his life can turn his life around, I believe that you can too! Just take small steps every day, improve yourself little by little and you will reach your goal! If that is not possible, at least try to make the most of your life. Life is extremely limited and fragile, so try to enjoy it as much as you can!