Should I make a move on him???

Sooooo yeah, I know it’s a little weird, but I’m really super into my professor. He’s super handsome, he’s hilarious, and he’s single. I would never ever ever make a move on him while he’s still my professor. But... I found him in Facebook. Once he isnt my professor anymore, I wanna make a move on him or something to let him know I’m interested. Should I?? If so, how? Should I give him my number in person on the last day? Or send him a friend request on Facebook after the last day of class? Help.