This is awesome.People need to remember this more these days. Be contented. Don't run to another girl just because you see a "better catch." Yes, there are people greater than her. But there are also people greater than you. Yet, she choose you.
(note: there's a difference between caring about people, and caring about your own emotions in relation to people. yes, care too much about other people, but don't let it destroy you if they don't care back.) I'll remember this and be empathetic.