Is he really in love with me?

I liked this guy.. We never used to talk.. We just used to smile and greet each other.. I confessed that I have a crush on him and even he said that he found me cute.. Later just 3 days after dating, he said that he's fallen in love with me.. He said that I have all the qualities that he looks for in a partner.. He even said that he wants me in his life forever.. It's just been 12 days since we've started dating.. He's even given the boyfriend girlfriend tag to us just in 12 days.. My friends are saying that he's trying to manipulate me as it is not possible to fall in love in 3 days.. Is this true?

Is he really in love with me?
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