Am I going crazy?

I'm talking to this guy I really like him he said he likes me.
The other day I had a dream and in the dream he was seeing another woman.
Typically when I dream really bad things they turn out to be true.
I know he does talk to other people because he is his own person however seeing someone else is a bit different. What should I do?
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I think it’s really important to tell people that he had a girlfriend that he started dating almost 3 months after he met me. So when we started hanging out he was with someone. Crazy.
Am I going crazy?
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