If you do seek advice from a counsellor, they are going to be there to support you, they are trained to do these things, it is their job. They won't let you down. It's easier to talk to a counsellor than you probably realise, because they are there for these situations, know how to make you feel at ease and can help clear those thoughts and grey areas we all have. But it may take time to find the person for you.
I agree that your friend probably didn't realise how you were and was probably trying to remain upbeat towards you so she thought she was doing fine.
Like Jigglyb4ll said, depression does become a very self-absorbed thing. You don't care about others, what they are doing etc. All you care about is this big dark cloud you have hovering over you and how you wish it would just go away, but sometimes wishing alone isn't going to make that happen.
Medication can be a short term thing, unfortunately for me I have been on them for 4 years now and I know if I don't take them I can get worse, even if I only miss a day! I definitely need them, but really didn't want them at the beginning, but I was so happy when they had started taking affect, I felt like I was the old me once more.
I lost control, I didn't know who I was, I started spending all day every day in bed. I didn't wash or shower, I couldn't see the point. I cried nearly all the time because these feelings wouldn't leave me. In the end, I was caught out by my boss and she talked me into going to the doctor, she saw that I was sticking pins in to my body and urged me to see someone. Please don't let yourself get that way.
I urge you to go back to your doctor and see what she says, I was offered a counsellor to begin with, but didn't accept the help, I just took the medication. I even emailed The Samaritans to talk to someone else about how I was feeling.
We are all here for you, and I'm sure we are all hoping for the day you come back and say you've spoken to your gp again.