Am not able to find what I want

Hello everyone, I need your help since I can't understand my husband reaction about sex. We are married for nearly two years now. I am always the one who is craving for intimate moments with my husband. Before he used to have sex with me on his own wish only during his off days from work. Now the situation is different I am working too he is having 2 consecutive off days and me only one. On his second off I am with him at home. After one week of work I want to have sex with my husband on that day but he is not interested. Yesterday I asked for sex but he refused saying that he is not in mood and that he will be tired for work and also that he will have stomach pain. Every week he is doing same thing to me. I am begging for sex every time. Should I punish myself and him for not having sex anymore. I told him yesterday that if I find someone else I will go with him. In my absence he is always watching female masturbation and nude babes pictures. I am regretting to be married to him as we are having 10 years gap maybe he is too old for me. He is also having a small penis.

i have the same problem at times so i just act like im not interested either and dress sexy and then he worries and im 26 my bf is 48.