Girls, can you tell if a guy is nervous?

red324
I was at subway today and the girl making my sandwich was really cute. Out of nowhere she starts smiling at me and she's like are you okay? Are thinking about the cookies? Cause i guess i looked over at them for a few seconds. I was like oh yeah I'll get two chocolate chip. I know I'm having an off day today for some reason, but that whole interaction with her was weird. Then after I paid I blurted out you're cute. Lol she smiles for a second hands my receipt says thank you and then says have a nice day... I was gonna ask if she was single, but I guess my unintentional awkwardness kind of ruined the interaction I guess you could say. What do you guys think? Maybe go for it next time if I see her again?
Girls, can you tell if a guy is nervous?
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