Whats wrong with me

i have moved in with my first love, i left my husband for him, he promised me the world , as i was badly treated as a child and a wife i obviously went for it. now after 4 years we have had sex about 6 times every year. he cant get arroused by me, im not gross in fact lots of guys approach me but i cant do it for the man i love. he wanks all the time over porn and this hurts me. help what am i doibg wrong? im climbing the walls for nooky.