What does it mean when a guy makes you a mixtape?

Sooooo this guy I've crushed on for the longest time got me a mixtape for my birthday:3 we had a conversation about it at school and he made me another one:D what does it mean? He made me a third one yesterday, and I just sort of want to know what this means. Thank you!!
What does it mean when a guy makes you a mixtape?
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