Not sure if this counts as "alone" but you could schedule regular skype video calls with friends/relatives. It took some doing, but I'm a lot happier living alone when I still see and talk to my family a few times a week. I'm actually surprised more people don't do this.
Thank you for your advice, but I don't think that's exactly what I'm looking for. Rather than seek out human contact because I'm not comfortable being alone, I would rather be comfortable being alone and then seek out human contact for its own sake.
If it's worth saying, but not worth its own post, even in Discussion, it goes here.