Is there any way to tell if a person is likely to cheat in a relationship?

A friend is asking Is there any way to tell if a person is likely to cheat in a relationship?

I know that some people tend to fall for a certain type of person without even realizing, and since I've been cheated on once I'm wondering if there's any way I can protect myself next time around (besides changing things about myself, which I'm conscious of as well.)

Specifically I'm wondering if I'm attracted, without realizing, to the kind of person who'd end up cheating. Is there a "type" or some characteristics that can suggest to me even subconsciously that this person is likely to cheat, or likely not to cheat?

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