Disconnected

I don’t understand and honestly I am pretty lost in my own head. Constantly begging for the physical touch. Longing to be laid down by the one who says he loves me. But, how can he say that when he never craves me? Can go weeks without even touching me sexually. Why am I the one constantly wanting him and longing for some for of chemistry. Many other men want to give it to me but I long for one person. How can he lay to me every night and not feel the absolute urge to make love to me? It tears me apart. It makes me feel lonely, unwanted, and it rips the image that I have of myself up completely. Its been almost three months of this and I feel like I am drowning.