Am I being used or does he not know how to show his feelings

I was a single mom for four years odd. I have ment a man who I do love and wont but sometimes I feel hes using me. He has a low sex drive he says but when we do have sex its more than good, we go areas noone else has. But he never comes on to me and just recently I discovered he watches porn regular which I know its silly for that to upset me but it does because if he came on to me it would make me feel wanted. But thats not all I discovered the porn sites he has been selecting are really young looking teenage girls and only two weeks ago he joined a online chat flirt site which is live. So hes actually talking dirty with other woman. It upsets me and makes me feel he doesn't find me desiable. I have tried to bring porn into our relationship and I will put one on here and there and ask he doesn't do it behind my back. Like I said it wouldn't be has bad if he came on to me but he doesn't ever. I know I have trust issue but this is a example why I do because hes lied and still denies when the evidence is there. I dont know what to do I have spoke to him and explained how it makes me feel bit no change. He says he loves me every day but he doesn't make me feel wanted sexually, I get more looks from other men than him. When I get undressed he doesn't look why ? Please help because it is really knocking me down

Run don't walk away from this guy. He does not have a low sex drive he is a pedophile or at least someone attracted to underage girls. You don't need this. Further I suspect this is dominating more than just your sex life. You have low self esteem and he likes that. Someone else would appreciate and love you for the way you are, not what you do for him. By the way he does not look at you because he is cumming to something in his head, not you. He is fantasizing that you are one of those girls. It is not your fault or your problem.