Help. My boyfriend and his friend.

So ive been dating this guy for 9 months. (Let call him bob) Right before we got together i kissed bobs best friend kevin.

Kevin and me are best friends now. Bob and me argue everyday and just dont want the same things in life. Every time kevin gets drunk he tells me how hes attracted to me and im soooo attracted to him and i just cant work it out.

I love bob so so much. He treats me well.

But kevin actually has ambition in life and our chemistry is off the chains.

I dont know what to do. I want to wait and let it end with bob naturally. but i feel so so so terrible. I honestly feel like im the biggest bitch on earth. But i cant help how i feel

Im not sure what to do. I dont wanna hurt anyone but i just i haven't been able to tell ANYONE about it. Someone help me with advice?? :/

**please be nice i know im terrible**