@Medusax,
I don't believe you should ever let past experience(s) define present or future experience(s). Sure they can be helpful and informative but you can't let them be your "idiots guide to Life". With your outlook you may as well give up now.
May I ask just how many times have you been cheated on by the way? If it's less than a thousand I will be disappointed by your abject misery and even if it is a thousand that's still a relatively small number in comparison to the more than 3.5 billion men on the planet.
Futhermore you're giving advice based on this very small sample size. This is bad mathematically, scientifically and therefore ultimately statistically.
This all just loops back to my first comment on this post but to avoid going around in circles, like a boat with one oar (seemingly your favourite mode of transport) you should really learn from the actions of a fully submerged horse.... They only swim in one direction.... forwards. You need to do the same me thinks.