Is it normal for a guy to fall in love in two weeks? And could that love be considered sincere?

I was just friends with this guy and then he said he liked me even though we just talked for a month or so. And my other friend told me that he had liked me in the last two weeks. I am ok with dating this guy. Although I need opinion on whether his love is sincere.
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+1 y
Though I have to mention that this guy
- is loyal to his friends
- seems like a sincere person
- Has top grades in all his classes
- isn't the type of guy you will hear rumors about all the time for cheating
Is it normal for a guy to fall in love in two weeks? And could that love be considered sincere?
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