Cheating never makes sense to me. I find that I am very loyal in the relationships I have (not necessarily just romantic ones) and I feel obligated to stick with it not matter how uncomfortable it gets. Even if a guy who appears to be a better catch appears and wants to pursue a romantic relationship with me and I am already in one, it is not allowable too pursue the relationship with the new guy.
Be faithful to the one you have. Intentionally love the person you are with (as in use love as an action and not as an emotion), pursue that person, serve that person, trust and respect that person, and give yourself to them. Hopefully they will do the same, but if they do not, that is no excuse to not be faithful.
I do not see cheating as only being physical, but the idea of pursuit, if a person considers themselves to be in a romantic relationship with person a, and then interacts with person b in a manner of pursuing a romantic relationship or redefining the previously existing relationship to one with a romantic context, it is cheating.
I also find divorce to understand outside of very certain very limited situations. This also seems to go against my idea of loyalty and sticking to one person.
_________________
__ /(. . )