Here is how the Mercedes story line for the prom episode went for me

When Mercedes was hoping and wishing to go to prom with a boy and have her tell her she’s beautiful. And she knew it wasn’t going to happen.

This was me

Then she got Sam to go to prom with her and then I couldn’t relate

She was sitting by herself at prom, not dancing with a boy. Then I could relate again

Then Sam came up to her and told her she was beautiful and asked her if she wanted to dance. And I couldn’t relate again.