depressed

I try my hardest to keep him interested in me but I'm never good enough. He asks for sexual favors he likes and all the sudden he's just not attracted to me. He blames stress we have no stress at this point... bills are paid etc. he makes me feel so guilty for wanting to have sex and please him. He makes me feel so guilty for loving him. He has doubts in us. I keep trying he has given up. I feel so alone. I'm always crying myself to sleep