I could list almost infinite reasons to not take back a cheater. Still, many people have no problems with infidelity. Personally, I don't think I could ever trust them again. If your partner's cheated on you, take a long hard look at these reasons to not take back your ex after cheating. While it works for some, being with a cheater is usually awkward and even painful.
1. The Relationship Will Never Be the Same
The moment you discover the infidelity, your relationship is forever changed. I think this is one of the biggest reasons why you shouldn't take back a cheater. The entire dynamic of the relationship changes drastically. You'll always be at least a little distrustful. Every time your partner looks at someone else, you'll wonder what they're thinking. Basically, you'll feel like there's a wall between the two of you.