I'm glad you posted I'm the same, i never feel i have the right to post...or i feel what i say is useless (yeh i think the same about this post too).
I think i understand some of the stress, i'm trying very hard to limit the amount of stress in my life atm, but last semester of uni with all the work...and gosh does depression make it darn hard! I've given up thinking about jobs for now, i haven't a clue what to do, and to be honest if i did think about it i'd have a melt down....so i definately feel for you with all that load on you!
I haven't had therapy but i did some CBT in counselling and yeh it made me feel 100x worse afterwards because for me it basically showed me how awful i am! I'd go away and cry for the rest of the day after...and soon i gave up. But i think she was not very good at it to be honest. So well done you for getting through your session! I'm proud of you!!
I think you should tell your friend, i took the plunge and told a small group of friends around me, mainly because i had to go to hospital and home for a long while but also i needed their support when i wasn't with my parents and they have totally stepped up to the challenge. I would try not to worry about stressing her, you know the boundries that would be too much of a burden and sometimes the release of just saying something really helps. Just a thought anyway....

Sending you many cyber hugs and prayers your way. Keep fighting!