Public transportation etiquette

bcda000000000000 We need a simple way to communicate this sentiment: "I saw you on public transportation today and I very much wanted to say hi. But I didn't want to bother you, so I didn't say hello. I'm concerned you think that I noticed you BUT avoided you because I don't like you. I definitely do like you, but wanted to respect your space." Is there a word we can invent that does all that work?