Being cheated on is one of the worst things that can happen to you. You invest so much emotionally, only to realise that the other person was never really as involved as you were in the first place. It is hurtful, and can really piss you off.
While there is no such thing as putting people you date in categories of being a cheater and a non-cheater, there are some facts (backed by research too) that can help you figure out if the relationship is truly worth it. These are just signs, and can differ in every relationship, but they can be great indicators too. So watch out.
1. His friends are in committed relationships
In M. Gary Newman's book, The Truth About Cheating, he points out that if his friends are trust-worthy and in a committed relationship, chances are he will be too. If you think about it, we are deeply influenced by the friends we have, so this makes a whole lot of sense. If he is surrounded by people who think that cheating is cool or okay, he might be thinking along the same lines too.