To put a positive spin on this it is nice that you can communicate with your adult son but I reiterate that you should not be dependent upon him.

So, this means branching out and finding aquaintances. I have a few ideas on this. One is to turn to your mental health community. Contact the local association or office. Many host drop in activities in addition to support groups where you ccan meet like minded - and supportive - individuals. They can also point you in the direction of other groups and resources. I find my volunteering (at a museum) provides me opportunity to meet people and socialize. In additon, my boyfriend has included me in some of his activities where I have met my own aquaintances. Finally, I found great enjoyment when I took a pottery class.

The point is that there are ways to meet new people and if you are proactive it will happen.

As for your son. While it is a case of your house your rules you need to avoid the temptation to meddle and expect him to be a friend. You are the adult and he is (still) the child.

I'm of the opinion that if a youth isn't going to school they ought to be working - and paying rent. You hold the power here.