I'm a Potter?

"You don't know anything about me?" I said to Draco as he stepped up to me. Our noses almost touched.
"Really Potter? You've been nothing but a coward hiding behind all the Hufflepuffs for the past four years. Hiding in your brother's shadows. Oh it must kill you," sneered Malfoy.
"Is that really what I was like?" I asked.
"Yes, what's the matter lost your memory or something?" Draco asked.
"Yes, as a matter of fact I did," I replied.
Draco laughed as his head shot up pointing his finger at me.
I smiled sinisterly, "Do you want to play a game?"
He looked at me. "When Voldemort comes back I'll kill him instead of my brother. But in return I want you to do something for me," I said.
"What are you talking about you stupid halfblood. Don't say his name out loud and his isn't coming back and he does. You wouldn't stand a chance against him," Draco said fearfully.
"Humor me," I quipped.
He looked reluctant but he relented.
"You'll ask me to marry you," I smirked in triumph.
Draco looked like a fish.