please help, i need advice....

we've only been official for quite a while and yet things changed a hell lot ever since then. now she's asking me to marry her so that my jealousy will vanish. she's working in a military area in iraq and i'm here in around gcc. we're always fighting and our biggest problem was her attitude of being such an asshole and irresponsible. our relationship is draining me and i really don't know what to do. i love her but i hate her more.

 we're always fighting, we can only be sweet for a more hours then the rest of the night and day we're fighting. i think the passion's gone and all she's ever blabbing about when she comes home is bed or sex. 

 i don't feel loved, respected or valued enough in our relationship. the only thing that remains me with her is because of finances. aside from that i'm already on the edge of finding another one. 

so please tell me, should we still get married or not? and it's dated on my birthday next month.