Yeah, I'd just not get married.

Not a big fan of marriage in the first place, and with the extra incentive not to, there would be no doubt in my mind that I'd just stay a bachelor.
If however, I
must get married, then I'd go for the chick that doesn't cheat on me, but doesn't really love me either. I think that she must be a really great person to resist the temptation of cheating despite not truly being in love with her husband, so yeah, probably a keeper (conversely, it could mean that she's so ugly, she can't even land a [censored]-buddy, but I'm introducing
far too many variables into this...) Also, I noticed that you used the phrase "doesn't love you
yet". Implying that she'll fall in love with me at some point, I don't see why I
wouldn't want to marry this woman.
Edit: But if the woman who loves me is cheating on a hot lisbian, and let's me in on the action, I'm totally there.