Forgive me because I'm maybe reading in too much, but it doesn't seem like you're asking how to be alone. It sounds like you might be asking how to deal with your new situation, which must be very difficult. If that's not out of bounds, one suggestion is to try what's called "rejection therapy." That is, make it a daily goal to go out and get rejected at something. It shifts something mentally and I hope it might be helpful for you.