One more thing, when your friends can't go out YOU go out!!! Dress up, look awesome, take yourself out to dinner, get one martini (chocolate!!!), then go to a bookstore like Borders or Barnes and Noble and fill your mind with knowlege and positive stuff!
I know it's not easy going out alone the first time, but I did it and eventually enjoyed it. Sometimes you even meet interesting people!
Yikes! That is a pretty scary thing. I have gone out to the book store by myself, just didn't even consider going out that night, I was just so upset, but I will remember that for next time.