<human>: Could you distill the essence of the text into 1-3 sentences?

My boyfriend is bisexual and that gets me quite uncomfortable, he also jokes around about cheating on me and crealy states some lies. 

e.g. he told me when he was younger he had a crush on his best friends sister, now he is telling me he never did after making a joke about cheating on me with her. 

He wants a threesome and wants me to peg him and I said no, he says fine but that makes me feel insecure. 

He is lovely, but I don't know if we're cut out to be with each other. We live together and spend all of our time together and have sex once a day as well as cooking for each other everyday, so we're pretty close. If say, I was to break up with him, what steps should I start making to ensure that the break up wasn't as hard on the both of us? 

and make it easier to accept that he would probably move on faster than me because he wants to experiment with men?
<bot>: I feel like my boyfriend and I are not compatible and I want your opinion on it. I also would like to know how to make the break up easier on us since we're so close to each other.