Used to sit alone at lunch in my freshman year of high school. One day some girl sat at the table, and continued to sit there for at least a few weeks. I thought she was cute so I bought a cookie (untouched, in a paper bag) from the school's coffee shop and said something along the lines of "They gave me an extra one on accident, and I don't feel like eating it. Do you want it? I'd rather not throw it away". She looked a little confused and then (politely) responded with "Ah, I'm good. Thank you though".
That was probably the best way it could've gone and it still damaged my young mind. I sat down and looked at my phone for a few minutes before getting up and moving into a hidden area of the front foyer. I kid you not, I never ate lunch in the cafeteria after that. Even on the last day of my senior year I ate in that hidden part of the school.