@jibberjabber,
You know the rule of cute guys with girlfriends, flirting with other girls.. No go zone and so your question really is why should they do it if they have a girlfriend when you are taking it as a possible "date to come"....
What a compliment if you use it to your advantage, that being, take it in, acknowledge that you are cute instead of thinking that you are not and smile in that knowing.
Realise that "people" compliment with no intentions as well and mean it.
Quote:And more importantly, how do I let it stop bothering me so much??
Stop looking at it as if they may be a potential date and look at it for what it is. Obviously you are cute, it's recognised. Just keep using your intuition and weed out those that have girlfriends as " a compliment" nothing more to those that don't.