Why always one you like don't like you?

How often does this happen to you?

To me it happens 99% of the time. One who I like will either decline the interest (rare), leave it open (very common) or accept the interest but will ghost after few messages (very common).

Most of the time the people who are interested in me are the ones who I have no interest in. It has never happened that I am interested and she is also equally interested.