I am the other women...Well almost....

I love this man i have been with him for two years, we work together, we see each other all day , after work he comes over, he treats me like a prince, he loves me so much , he never says no to me, he is with me when i need him, when i'm sick he takes care of me and when i'm down he tries to make me happy, he tries to be as much as possible a part of my life. The problem is he is married and what he doesnt realize is that he is the one who makes me sad that i cry myself to sleep sometimes.. he says he is there for me.. but i know better... what hurts me is that i love him, and he knows that , why if he loves me as he claims he does, why does he keep hurting me so much... I would like to leave him, i would like to forget about him, but i cant , i have tried .. i cant....I am a 23 year old male and he is 36 year old male/