Let me take a shot at these. Remember, free advice is worth what you pay for it. :-)

1. Fear of back-sliding
Good grief. I'm SURE this is one we all have. I spent a week in the hospital in February and am scared as hell I'm going to be back there before the end of the year. And when I'm feeling well, which I do occasionally :-), I'm terrified it won't last. You'll just have to join the club on this one. :-)

2. Guilt that others I love are still suffering more than I am, at least for today
People are going to be in different stages at different times. God forbid we all crash at the same time -- what a disaster that would be! :-) Those who are doing well can help those who are not, and someday the favor will probably need to be returned, and the scale can even out that way. No guilt required. You can be sorry that someone you care about is hurting, but it's not your job to take it upon yourself, other than to be supportive.

3. Fear that getting better proves I really am just a drama queen
You get called that by people who don't understand. Getting better proves you were sick!! i also get accused of using my mental health issues for attention, and you know what? I've stopped talking to those people. Life is too short to take crap off people who haven't ever walked in your shoes.

4. Fear that I won't be able to build nourishing relationships and will be backslide
I have good relationships with "normal" people, so it's doable. but in the end, it's going to be the ones who have been in the abyss themselves who will be your best friends. My dear, lovable, wonderful therapist really digs deep down and tries to get down in there with me so he can understand as much as possible, and I adore him for it -- but he's still never been depressed himself. As hard as he tries, and as much of it as he DOES get, he's never going to "get it" all.

As I try to tell myself in better times: One day at a time -- no guilt -- move on.

Hugs,
Candy