Hey so u said she liked you last year right? And she knew that u have a stutter? Then GO FOR IT MAN! She likes you even though you have a stutter so she doesn't care about that. She likes you the way you are. Just go to her, and say hi or wave or smile at her when your eyes meet. I'm same as you, a lot of girls have tried to talk to me ( about 2-3 every year lol) at school, until i dated a girl in my class whom she STICKED to me, like at first i told her that i prefere to be friends but nah, she told me some time after that i hurt her and that she gives me "another chance" (even though i clearly friendzoned her) and yeah i broke up with her afterwards lol But the thing is just go for it dude and i assure u that u wont be disappointed ;)