I hate when I get that feeling

when I know I'm about to cry. When I feel the tears well up, and my face gets flushed. But I hate it even more when I have to hold it in, because someone walks in, or catches me. Because I don't want to have to explain myself. I don't want to hear the 'Are you okay?'s and the 'What happened?'s. Because I know that what I'm feeling, is something you may THINK you understand.. but really, you don't understand it at all.