You have a "Lucid Dream" then you meet a guy in your dream he is attracted to you

But you don't think that you will meet him in the real world, he continues to be very interested in you.. he wants you to be only his, He can even hurt himself to get your attention.. Yes, you could say he is "obsessed with you"

His name is Kai he will do anything to get your attention, your affection and get you