To answer, I had to look at your birthday. Assuming that's not a fudged year, I can say that it's unlikely that you've known love. You've experienced something that feels nice, and easily mistaken for love, but not love. It's easy to move on. You're young.
And as for easy? Kind of the same vein; you moved on. You've found someone with something else to offer, and you're learning about these womens qualities that work for you.
Easy would be like, taking everyones offer to go out, reguardless of any real attraction. Just looking for fun, and pleasure. That's easy.