For the last 3 years I've suffered with depression and for as long as I remember social anxiety. Through out this time I've had couple of months at a time where I feel better, generally because I've had some sort of distraction. This is when I've entered a new relationship. When I come out of my last relationship I never felt so low. This was my first relationship lasted 16 months.I wasn't eating lost just over a stone in 6 weeks. I went to the doctors and was put on anti depressants. Then I started talking to New people for a bit of a confidence boost and before I knew it found myself in a new relationship. I was 'happy' for a couple of months and don't have a problem with my relationship it's me. I am making him unhappy as I'm so short tempered and irritable all the ttime and I hate being this sort of person. Any slight upset feels the worst thing in the world and over the last few weeks it's been awful I've been having thoughts nearly everyday. I've just gradually lost interest in life. I've had a few sessions of counselling and I know what she's saying is right but it doesn't seem to be helping. I've just reached this point now where I don't know what I want or what makes me happy.
It sounds like it might be worth you trying a different antidepressant, or increasing the dose of the one you're on. The right antidepressant can make a huge difference in some people. Have you tried talking to your boy/girlfriend about how you feel, if s/he understood that you're not doing it on purpose it might make things move more smoothly for the two of you.