In a relationship what other things are as hurtful and unforgiving as cheating?

What other things would have the same effect of getting betrayed, the same as getting cheated out? Other things (besides infidelity) that would cause you to block them and never want to see them again.

I was thinking if you trust them with your money and find out they've been using it for gambling or bad things behind your back. Or you find out they've been faking care and loving you (they never even liked you), using you for a dare, for pleasure or wealth. What other things would be betrayals besides cheating?

In a relationship what other things are as hurtful and unforgiving as cheating?
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