I hear you bro, tbh I don't really have a friend to share my such awkward situations with, maybe a friend i tell him sometimes, but he is like he doesn't care about it, so i just keep it for myself, you probably can write it in a diary that also helps a lot, tbh, the same situation happened to me as well, i had a block for like 10 seconds in a presentation!! So yeah very awkward. also i think that when you stuttered Infront of her you felt like she doesn't have interest in you because of your stuttering so you stopped those feelings, this is my interpretation i might be wrong.