I believe very strongly in journaling as "twitter to yourself". Things you would say over messages to a partner or something can be notes to yourself instead. Especially short term desires to tell someone something can be lightened by this.

For social generally though, I would suggest very strongly that you pickup something like an MMO or a game with a community that isn't offset. Games like Path of Exile (1) or OldSchool Runescape can eat a lot of time and still give you social connections, which can help get your mind at ease from being alone. I don't suggest exclusively single player games or things like that, though.