Why is He suddenly interested in me?

My crush knew I Liked him for 4 years. However, He Never did anything about it and Kept chasing other Girls. Now all of a sudden He can‘t stop watching me from afar.

Why does he do this? Did he realize that his dream Girls Are out of his League so that He has to settle for less (me)? Or is He making fun of me?

Why is He suddenly interested in me?
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