You've rejected affection for years.
And now you have it, and dammit, it's kind of weird.
He's been trying to woo you for a long time now, trying to break down your walls. All of his crushing might've made you start crushing, too. Maybe that's why you agreed to be his Valentine last year.
So, now, you're at an anniversary/Valentine's day dinner, and you just.. can't believe it. You still don't know how to respond to his affection most times. How the hell did you fall in love this time?
"You're so pretty," he tells you, looking at you like a lovesick puppy. You don't know how to respond. "Love you."
And you still feel a shock through every bone, 'cause now you have someone to lose. The first one to ever like you back. It's kind of overwhelming. But in a good way.