"Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind. " Dr. Seuss.
True love exists when you are a better person with your partner than without. Does your partner bring out your best qualities, your average qualities, or your worst qualities? I've experienced all three and when someone brings out the best in you, s/he's the one!
Here is a true love test that may help: http://www.ehow.com/how_4995867_test-true-love.html