Well, BDSM isn't an area I'm extremely familiar with, but your post raises a few flags to me. I think your reasoning for wanting a BDSM relationship isn't healthy, which is to me the key issue here.

You're using it as an outlet for what, to me, sounds like repressed emotional pain. I think it'd be more beneficial for you to seek a healthier outlet to work through that pain. Have you ever spoken to a therapist?
Mind you, I don't think there's inherently anything wrong with you having a BDSM relationship.

I don't think it's necessary you give that up. I just think your attraction to it is for the wrong reasons, though I would welcome someone more versed in the BDSM lifestyle to correct that for me if necessary.
That said, and I know you mentioned that it was in the past and that I am wading into the parts of the lifestyle that I'm not familiar with, be mindful of your limits.

I know play in the bedroom varies from partner to partner, but I'm concerned black eyes and busted lips might very well be pushing it. Just had to voice a concern there, and again, I welcome correction.
I hope things pick up for you soon.

Know you're in my thoughts and prayers, and I'm sending hugs your way.
Hugs,
Harley