Sorry to hear that your friends are drifting away from you. Friends tend to come and go out of peoples lives sometimes for no apparent reason. It hurts, but sometimes people would rather do the slow fade than tell you that things aren't working out anymore.

It sounds like your friends have been to busy with their jobs and their relationships to have time for you. If this is something they just started doing, then cut them some slack and give them some apace. I don't think that they don't like you anymore, it's just that they need to focus on their lives more at this point.

I have to say though that one friend of yours who decided to not contact you again after you got out of the hospital sounds like they're not much of a friend to me. I could never call anyone a friend that would ignore me after I got out of the hospital. It sounds like you need better friends.

The best thing to do IMHO would be to go out and try to meet some new friends. Join a meetup group. It's free to join. You can even start your own group, but you'll have to pay a monthly fee for that that. There isn't anything that you can do but wait for these other friends of yours to become available. If you contact them to much, you'll appear to needy and clingy, so just go meet new people for now.

If they call you and ask you to hang out sometime, great. If not, well, then move on. Remember, it's not you, people just tend to outgrow each other sometimes. Also, it'd probably be a good idea to NOT tell people about your mental health issues in the future as a lot of people do judge others for having issues even if they seem OK with it.

That's just been my personal experience most of the time. People are weird like that. And the worst thing is that most people will probably write you off as being "crazy" instead of trying to even understand anything about the issues that you have.