<human>: Can you condense the text into a few key points?

new account for this:

my lovely partner of two years (we have lived together since july) cheated on me with his boss. he works as a bartender in a relatively fun place, and him and his coworkers are always going out for drinks, but he got a little to close to her. they were together at work, but also went on a couple of "dates" (my words), where it was just the two of them. he claims that it only happened three times and all they did is kiss and send dirty texts to each other and i believe him. i will point out that we never lacked for sex, and i initiate with him almost every day of the week.

i love the man, and was totally willing to overlook the cheating and move on. however, during one of our conversations about it, he said that he doesn't consider kissing to be really cheating, and thinks that being with one person for the rest of your life is limiting. he thinks that casual sex/kissing/flirting between friends is "beautiful," and has said that he both wants to go out and make out with random people, as well as have threeways with me and others.

truly, i think i could deal with one or the other situation, but not him coping to wanting an open relationship while we deal with the fallout from his "affair". when we met, we had a lot of conversations about not liking polyamory and being burned by it in the past. fast forward to now, two years later, and he's saying that he can't really see a future for himself with only me.

part of me is interested to try (i'm fairly sexual myself), but the thought of him being with someone else hurts way too much because of his past indiscretions. i'm at a loss for what to do. do i try to open things up (my philosophy is try everything once), or move along knowing that if i can't do it, he'll cheat again and we'll be over anyways. any and all opinions are welcome. is he just getting restless, and is this something that'll pass?

xoxoxo.
<bot>: boyfriend cheated with his boss and while talking through it with me, admitted he finds long-term monogamy a struggle. we are now talking about opening our relationship. should i try to do so, or move on?