Cheating entails violating your partner’s heart. It entails disappointing someone who would have given you the world. Someone who entrusted you with his/her heart and relied on you to care for it.
Cheating is a betrayal of someone who truly believed in you and gave you a chance. You are cheating on someone who thought you were unique among your peers.
Cheating entails making the other person reevaluate the entire relationship as a result of your actions.
It means providing people a cause to go back and review prior memories to discover where they went wrong. You give them a reason to believe they are unsuitable for you because they are ugly, unsatisfactory in bed, or otherwise flawed.
It makes your person, the one you intended to make happy, feel guilty.
Even if you were the only one to blame, it lowers their opinion of themselves. Your partner will no longer be able to put their faith in you. Cheating involves severing ties with somebody you have known your whole life.
Cheating is transferring your burdens on someone else.
A burden that they have to bear for the rest of their lives. As long as you are in their life, they will always have doubts about your ability to go on; they will always be on the edge of their seats, fearful that this new person may do them harm the way you did.
Cheating is the deliberate deception of your partner over a prolonged period.
There was more than one error, even if you term drunkenly kissing someone else a blunder. You made a mistake by making eye contact with them and made a blunder by inviting them to your house in the first place. You made a blunder by allowing your lips to meet.
Cheating means you are capable of doing a shitty thing to someone you supposedly care about. Your morals are corrupt. It indicates that you are not ready for a serious relationship.