Forced to Choose Between Community and Sanity. What Do I Do?

Before the pandemic, I had almost no social life to begin with. I joined CrossFit a few years ago, and my local CrossFit gym has a small, tight-knit community of friendly people as members, to whom I've grown pretty close. Outside of them, the only people I have are my best friend, and my mom; nobody else, at all. Two months after the pandemic began, CrossFit reopened, but the coaching staff changed, and it's to the point where I've lose all the (little) confidence I once had at the gym, and the only reason I drag myself there now is because if I quit, it's just my best friend, my mom, and me, and like I said, nobody else. I value my friendship with these fellow CrossFit members, but I come home from the gym everyday feeling "less than," with a low self-esteem. It used to be that I was excited for it every day, as it was my only respite from a dull and cruel life. Now it contributes to the misery. I have little left to lose, but if I lose these friends, that might just do me in. But if I do nothing, it'll be more of this misery, and feeling like my psyche is being beaten to a pulp with no reprieve. What on earth can I possibly do in this situation? If anyone can by some miracle find a solution for me, I'll be unfathombly grateful. This really is my last-ditch effort.