Sexually frustrated

Ugh so here it goes. Im 23, my husband is 34. We have been together for almost 3 years, married 2 years. We had a GREAT sex life the first few months we started dating. But ever since he changed jobs, jan 2014, he has been slowly not wanting to have sex more and more. I've always been the one to intiate sex. Maybe once every few months he will intiate. His reasons for not wanting to intiate are that hes afraid to be turned down, his ex wife did that a lot, but he knows im constantly wanting to have sex. Making love to him is amazing. His other reason is he says when he gets super into it by intiating he gets too aroused and thinks he will go to soon. Which has happened but it doesnt bother me. I just want to feel like he wants me. Most of the time i dont. Last night his shoulders were sore from work so i got on top. Only problem is because of his curve its almost impossible for me to get off on top. Anyway i didnt end up getting off last night and he doesnt like it when i dont. He kept making comments today about it saying things like "maybe you couldnt get off because you are not attracted to me anymore" im like yeah there are two reasons i didnt get off. One, i knew you were in pain so i was more worried about you, two maybe if you actually ever wanted to have sex with me then when it actually happens id be more into it. Well his response is "i always want to have sex with you. i want to throw you on the bed, bend you over all the time. But i know i cant do that because you cant get off that way. So i surpress it." I cant get off with doggy style in two seconds so that means you should act like you dont want me at all? So you dont enjoy sex with me because it actualky takes work to get me off? "Shut up, i do enjoy it." Then conversation ends. It also bugs me that he will tease me all day but then at bedtime just goes right to sleep or tells me no. Its just so frustrating. I know he loves me, hes not cheating. I just wish he would be more interested in our love making. :( ive spent a lot of sad nights awake the past few months over it. Plus im having surgery on July 1st to try to clear my tubes to get pregnant. How the hell can we get pregnant if hes always too tired or whatever his excuse is for no sex. Sorry this is so long. I think i might just give up and act just like him, like i dont want it. Didnt realize having a wife who wants you constantly was a bad thing.