Im 5 months pregnant and i feel so alone.....?

my fiancee and i are pregnant with our first child... it was an unplanned pregnancy, but a wonderful and exciting surprise! as soon as i found out i became the healthiest mommy to be! quit smoking/ drinking/ im on my second pregnancy book... eating healthy/ yoga/ saving money... im all into the "trying to be a good mommy to be" jive!!! my fiancee on the other hand is excited about having our first child, but he is not there for me mentally or physically. i read him little quotes and lines out of my pregnancy books but i feel he isnt listening... or he doesnt care. he comes home from work and sits his *** in front of the tv or plays video games until i get home from work. and once i walk through the door after working 8 hours on my feet all day.... he wants to kno whats for dinner!? wouldnt a wonderful man ask his woman "how was your day honey? can i rub your feet for you, cause i kno youve been standing on them all day? let me make dinner tonight! let me do the dishes/ laundry!" but noooooo.... and for him to help me around the house... ha forget it. he will help if i ask him 5 or 6 times... then he will get huffy puffy when he finally does help. he acts like a child. i kno that im more hormonal but mentally it is taking a toll on me... we argue.. and i cry more. and he knows i cry but doesnt do anything about it. and on top of that he is drinking more. not every night but at least 1 or 2 nights a week, then weekends... spending more time with his buddies. he invites me out with them... which is great i get to feel involved and eat a nice meal or two but once he starts drinking we end up staying at a restaurant with a bar for hours and i have to bug him to leave cause my pregnant *** is tired! then he gets mad at me cause i want to leave. and of course i have to drive his drunk *** home. i do not think he understands what im going through carrying this child. ive tried talking with him about it.. and he says he will change... and he will be the best man for a couple of days... then its back to normal again... he does it all over and he just blames me for being angry and upset with him over stupid things because of my hormones. oh and dont let me forget.... sex? ha ill just forget about that... its like pulling teeth to get him to make love to me. we used to make love at least 3-4 times a week... now its once every two weeks? i dont understand. is he not attracted to my baby bump body? it makes me upset and im becoming depressed. i do not kno what else to do. please help?