Wow, I've been exactly through the same things with my partner. One week he was saying he loved me and the next one he broke up with me. He was diagnosed with depression a year and a half ago. He's taking Lamictal, which has had horrible side effects: he forgets everything. He gets lost when driving, he forgets full conversations, he forgets important occasions, he forgets several days in a row completely. And finally, three months ago he forgot he loved me and has been having sex with other women constantly.
I am heartbroken beyond words. Depression is really a horrible, horrible illness. The worst thing is that you never know if the person you loved will ever come back. My partner was a great, funny, intelligent man. Now he is a confused, cruel, self-centered and forget-it-all man that I can barely recognize. I tried to help him, I tried with all my heart, but he pushed me away and cheated repeatedly. And every time I came closer, to say I was there for him, he found a new way to break my heart again.
Not all cases of depression are like this, of course. But my experience has been a constant, very painful rollercoaster. And the only way possible, for me, was the way out. It was against my will, but he pushed me away so hard and hurt me so much, that he made ir impossible for me to stay. And now I am so, so sad.
I hope that in these six months, since you last posted, things sorted out well for all of you.