I compliment my crush on his looks but he doesn't compliment me?

I know he likes me (we haven't said the words yet). He is on the shy, inexperienced side (both of us have never been in any relationships). But I have told him he looks great, would look great in a certain article of clothing, etc and he has never told me I look nice, pretty or anything! I am not vain it's just it is confusing me.
I compliment my crush on his looks but he doesn't compliment me?
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