How to stop being scared of tall, or muscular men?

I'm really scared of tall and big men. Originally I was In an abusive relationship, my boyfriend was really tall and muscular, but I'm super small and weak. So every time I see a guy whose tall or big I get scared that he's going to hurt me, or that he can hurt me.
I'm supposed to be going on a date that a friend set up and she said the guy was really tall. He sounds like a really nice guy spin don't want to cancel, but I also don't want to be afraid the whole night.
How to stop being scared of tall, or muscular men?
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