Do ou know what his love language is? Do you know what his primary needs are? Identify those and it should start you on the path to recovery. Maybe his primary need is NOT sex, so concentrating on sex may not solve your situation. Maybe he needs recreational companionship, maybe he needs attractiveness, or maybe something else. Check out the "5 Love Languages" and also "His Needs/Her Needs" and see if you can figure out what he is lacking.