Drunk
You’re at a party. Draco is your enemy and he’s also there. You’re drunk, he notices and gets you out of the party to grab you to his dormitory, so you’re okay. While you’re drunk you start saying a lot of things about Draco and how cute he is (even though you hate him) without realizing that he is the one you’re talking to. During that, he’s starts to fall in love with you and flirting back.
Drunk
You’re at a party. Draco is your enemy and he’s also there. You’re drunk, he notices and gets you out of the party to grab you to his dormitory, so you’re okay. While you’re drunk you start saying a lot of things about Draco and how cute he is (even though you hate him) without realizing that he is the one you’re talking to. During that, he’s starts to fall in love with you and flirting back.