Do guys use Post Notifications?

I've (18F) noticed every time I post something on Instagram my guy friend (18M) he's also my crush, always likes the post within seconds of me posting it. I figure he has his post notifications turned on for my account but I didn't think guys would do that for a girls' account. I've tested with my other friends to see if he has them on for them by having them post something to see how long it takes for him to look at theirs and he took a lot longer for them. Does he maybe like me? I don't really see any other reason for him to have them on for my account.
Do guys use Post Notifications?
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