Secret smiles in an exposed Place

"I was sitting on a toilet in a public place, exposed and a little awkward, with people moving around me. The girl I'm in love with was there too, talking to a guy who is also a close friend of mine. While she chatted with him, she and I kept looking at each other. Every time our eyes met, we smiled, a small, private exchange across the room. I felt my heart lift each time, as if the two of us were sharing a secret. Then another friend walked up, someone I only ever say hi to and who knows nothing about me, and shook my hand while I was still sitting there. It was strange and a little funny, but I went along with it. When I woke up, I felt warm and giddy from the smiles, with a touch of embarrassment from the setting. I lay there replaying her look, half happy and half wondering what it all meant."