I don't know what to do.

I'm obese, 270lbs, and 5'8. Over the course of a year I had lost 100lbs and was at 250lbs. I began to maintain my weight, and got really discouraged with myself, I lost my want-to, and gained 20lbs. I feel like utter shit. I don't feel like doing ANYTHING. I'm bitch almost 24/7. I don't feel like showering, getting dressed, doing my hair. I don't feel like cooking or cleaning. I feel like I'm stuck in the body of a complete stranger. I've been married for 5 months, and already I feel as if ive caused us to leave the honeymoon phase. I don't feel like snuggling up with my husband. I don't want him to touch me, or see me naked, or anything. I feel like he deserves so much better than what I can offer him. I apologize to him a lot, because of how I am. You guys, I dont know what to do. I dont want to lose my husband. I don't want to feel the way I've been feeling. This person that I am lately, is NOT who I want to be. I don't know what to do..