If I had to choose... I’d stay single.

Neither. Just walk away.

The very concept is “cheating” is assuming one is lying. They’re the same. Truthfulness is trust. If I love someone and they love me I couldn’t care less what else they do with their genitalia. If my partner tries to hide another from me, I know the trust is gone and that betrayal is what is so hurtful. Respect and trust me enough to tell the truth.

Aren't both the same? If you're cheating on someone, chances are you've told some sort of lie to facilitate it or cover it up. Even if somehow you've managed to cheat without explicitly lying, you're lying by omission because, in my opinion, just by being in a committed, exclusive relationship, you are tacitly saying to your partner that you are not physically or emotionally involved with anyone else.