Why am i sick of sex with my boyfriend?

I have been with my boyfriend for about two years. When we first got together we were very sexually active. Now we live together and our sex life has basically went down the drain. He wants it all the time and I never want to do anything. We went from...

having sex just about everyday to having sex once a month. I just feel like its more of a chore than anything. I never use to be this way before, I loved sex! But I still do think about it all the time and fantasize over having sex with other people. So I do think I still love it, just not with him. I've even gotten to the point where I cant even kiss him, it just bothers me like its annoying or something. I don't know what to do because he keeps bugging me to do it and it causes fights between us every so often. Any ideas of why I feel this way or hat to do about it??

There is a serious issue at hand when you don't even want to kiss your boyfriend. Simply put: It's sounds like you've might have fallen out of love and aren't attracted to him anymore.
The first question you should ask yourself is what are my feelings toward this man? It's very important to understand whether you still love him and if you still want to continue this relationship.
If you really think there is still a possibility for this relationship to work then my advice is to be honest about the fact that you aren't feeling sexually aroused anymore and that both of you need to work on your sex life. It might be that he got into the habit of doing the same old thing and isn't taking enough time for foreplay or romancing. Maybe you want to try new things and don't know where to start.

All this should be discussed with him and you should try to make the experience more pleasurable. If you don't work as a team this problem will never resolve itself. Be gentle and caring but honest about what you need and want.