Can a guy like you but still underestimate and not value you?

I've often heard things like guys don't really care about credentials etc.

But like I don't know I feel this one guy I sometimes thinks he underestimates me.

Like he acts like a guy who likes me but also one who isn't really trying to get to know me. So that confuses me.

Can a guy like you but still underestimate and not value you?
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