Something about this group is making you uncomfortable.

I'd make a list and break it down. For example, is it just the members of the group or are you uncomfortable sharing in front of your therapist who is also the group leader? I too think those should be separate.

I see nothing wrong with you hanging back and not saying much right now. That's how I am. I kind of assess a situation for awhile and the people around me. I don't let anyone in right away.

I wouldn't push yourself to open up but I would try and figure out everything that is good and bad for you so far with the group therapy. If your 'bad' list is higher you might want to find a different group that talks about the same issues. Then keep your T for your individual sessions.

Recently, I've checked out on meetups.com they have groups that talk about depression and other conditions. There is also daily strength. It's an on-line forum like this one.

I would think group therapy is hard and if you're not getting anything out of it, put your energy into a different one...just a suggestion.