Are cheaters really worth the heartaches?

Cheaters aren't worth time or effort at all. My ex cheated on me while we were together and I still gave him a chance, which was stupid of me, he definitely did think he was 'one up' and that he could get any girl he wanted, we've been apart since February, I am dating again and apparently he is missing me a lot, if he cheats once I strongly believe he'll do it again.