There is nobody to blame for solitude. For loneliness, however, we have to hold ourselves accountable.
Loneliness means you cannot stand your own company and are idle. Hobbies, goals and self-improvement are always options. You limit yourself by assuming that other people are the only means to end your loneliness.
I actually have no idea. This isn't a problem I face, so it's a bit difficult for me to put myself in your shoes. I do know that it is possible, since many people ik irl have conquered loneliness. If I find out a particularly impactful story, I'll be sure to update you here.