How do you know if its true love ?

I jumped from relationship to relationship as well, until I left one relationship for what was my most recent girlfriend. I can tell you that I definitely loved the two girls I was with before this one, but there was always something missing. If there wasn't then I wouldn't have left, or cheated, but I did. She ended up walking out on me after 3 years and it has crushed me ever since. But to get back to your question, to put it as simply as I possibly can...... You will know that you've found true love, when all that you want to do is to day in and day out do anything you can to make that person happy and make that person smile. You see because you will realize it's true love when you yourself gets true joy and true happiness by making someone else happy. Your happiness will come from their happiness, that's true love.