i'm in the same position. i left school and it's been about 3 years without seeing all the friends i made. i'm not sure what I'm going to say, but I want them to know I missed them, and want them in my life, so no matter what I think it's going to be fine. does that help at all?

about sharing.... I think it's okay to share a little. I certainly won't be telling them I have schizoaffective disorder( not right away), but it's okay to let them in on the fact that I have personal issues that kept me away.

I might say, "listen, i've been in therapy and working out some stuff that really messed my life up." And i will let them know that i need and want them in my corner. i think what matters is that you're just there with them, and you want to have fun. like the ol' times. it's going be great to see them, i actually can't wait to be at the point where i can really let them in on what's happened, but not right away.