What should I think?

We were 2gether for 6+ years just married 8/07. We do nothing together not even sex if I do not start it. He says its because I am pregnant and he is not comfy( firt child ) He doesnt realize he has not shown any interest in me since a few months b4 we married on our honey moon we had plain boring sex twice out of 10 days! He is the one that wanted to get married sooo bad and I dont understand why he just act as if he doesnt even want to be with me anymore. He is rarely home. We se eachother in passing and whenever he wants to come to bed after 12am. ( I work 7AM-3PM) He NEVER takes me out. I always offer to go somewhere from movies to fishing as long as its out the house. He goes but it doesnt seem like he wants to be there with me. I kinda thinks he cheating or interested in someone else, but I really am not looking for anything to prove it so I wouldnt know unless he slipped up! The beginning was beutifulll!@ Now it seems as if he has gone backwards. I dont know what to think or do!