Is it normal to feel I can't trust anyone for a relationship?

I've been dateless for 2 years now and I'm taking my time. Yes my past ex boyfriend cheated but it wasn't even with another woman (the more common type of cheating). It was with his so called homeboy; a man. I didn't know he was bi.

Well I feel I can't trust anyone for a relationship at this moment. Is it normal to feel that way?

Is it normal to feel I can't trust anyone for a relationship?
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