Need sex now!!!

I just don't get it!! My husband never want to have sex really anymore, he usually does after about 2 weeks of nothing and then when we are about 2-3 minutes in he's done cuz he couldn't hold it so I just feel like he's just using me just to release himself when he needs to and I do a lot of stuff to show him that I'm horny like rub his dick, Kiss his neck ext...but still nothing!!! Like really I would like to get laid more then 2-3 times a month!! Sorry had to rant.