Girls, Would a girl deliberatly take her time to accept a facebook friend request from a guy she likes?

I suspect this girl likes me. I noticed she took about 15 hours to accept my friend request. She and I talk everytime we see each other and she is chill with me. She is always starting conversation with me in person. But she took her time to accept my friend request
Girls, Would a girl deliberatly take her time to accept a facebook friend request from a guy she likes?
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