I feel somewhat unqualified to give advice on this. I've never had a boyfriend. But you shouldn't stay with someone just because you're afraid of being alone. I'm also a big loner and I haven't had any friends in about 6 months, but I'm doing okay. It's unpleasant sometimes, but you learn a lot about yourself, which is something that everyone needs to do at some point. And if you ever feel really alone, you can always talk to me or anyone on here.