In a few years, you'll regret leaving her. In a few years, you'll find yourself missing her, and wanting to hear her laugh. In a few years, you'll want her to smile when she sees you, again. In a few years, you'll miss the way her cheeks went pink when you called her beautiful. In a few years, you'll regret making her cry.
But unfortunately for you, in a few years she'll finally be happy with someone else. In a few years, someone else will be hearing her laugh. In a few years, someone else will make her smile and call her beautiful. In a few years, someone else will love her like you never did. In a few years, she'll be happy with you gone.