Most important piece of advice I could ever give - tell everyone you stutter. Hiding it or avoiding conversation will make everything so much worse long-term. I've found that some people are a lot more patient than I'd expect. My close friends understand my struggle and are patient with me when they need to be. People like that exist, but you won't find them if you avoid conversation, and don't tell people you stutter. I highly doubt this girl will care about your stutter. I've found than many girls find it endearing somehow. Just make sure she knows, and try not to act uncomfortable. Stuttering but still speaking confidently is a good play. If I get on a block, I work through it, then keep speaking like normal. Try your best to not let it discourage you in the moment. Best of luck!