Life is hard, but you're not messing anything up, it's just the depression that makes you feel that way. Good luck with the partial hospitalization group, I'm in that kind of a group now. The group that my hospital has, doesn't do any kind of one on one, it has grps on goals, spirituality, relationships, men and women grps, tapping and meds. You can talk about some of your problems in those grps, but it mainly helps you to see some of what makes you depressed so you can talk with your counselors.
Keep your faith up, and stop feeling like your messing things up, because your not and that your a wonderful person.