I understand how you feel. I finally took myself to the doctor on Monday because I couldn't take it anymore. I'm now on medication and can already tell a HUGE difference.
I'm sorry you're feeling so low. I was there, too, and completely understand. The first time I went through a rock-bottom depression, my husband (now ex) took it personally as well. Simply remind your man that it's not about him, or the lack of him being a good man to you. You simply aren't feeling like yourself, and that's nothing to be ashamed of. I think some guys think that you're going to "blame" them, and simply remind him that this is NOT the case. You're feeling blue, and you're trying to get better - that's what counts.
I hope you feel better soon. I really think you should talk to a doctor...