Have you ever pushed someone away because you thought you wouldn't have a chance with them or?

or maybe because they didn't fit into the life you imagined for yourself despite of liking them?

First part of the question is more about pushing someone away as a self-protection as you think they friendzoned you.
The second part is about someone who you really like but they are not your type.
Have you ever put a break on the relationship in these situation or just went with the flow, try it anyway?
Have you ever pushed someone away because you thought you wouldn't have a chance with them or?
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