You probably won't read this, but just in case you do:
I'm sure you think I hate you and that I will do anything to steal your man "because he was mine first", but I need you to know that this simply isn't the case. I'm not here to call you names or be the "crazy ex" that you see in the movies. Hear me out, and I'll do my best to explain.
Sure, I disliked you at first when started dating him. I'm not going to lie to you and say that I was perfectly okay with a stranger coming into his life after our break up, but who wouldn't? How was I supposed to know that you weren't going to break his heart? I had no idea that you had the best of intentions because you were simply a stranger back then. He is someone that has meant a lot to me over the years, so I'm protective of his happiness, even from afar. I think that if you put yourself in my perspective back then, you would have understood. But I'm not asking for sympathy of the past, an apology, or even a stroll down memory lane because things have changed so much since then.
You'll probably never believe me, but I'm actually really grateful that you are around. You make a man that I care about very happy, and to feel anything less than respect for that would be hypocritical. To even attempt to put a break that happiness by trying to "steal him back" would be the exact opposite of what I want, and honestly just wrong.
Please don't mistake my kindness as fake or subconscious jealousy when I wave at you when I see you around town or like your Facebook status. Yes, you love the same man that I love, but we love him in different ways. I don't love him romantically anymore like you do; however, I do love him in a way that I will always want him to be happy, no matter where that takes him. And since you fill that happiness for him, I am very thankful that you came into his life.
We don't have to be best friends, but I just don't think there is a reason to be enemies simply because we both found great qualities in the same guy at different points in our lives. I want you to know that this isn't a battle of "who loved him first/better/longer" or whatever else girls can hate on each other for in girl world. I'm happy with my position in life and you are happy with yours. I just don't see the need to waste negative energy on each other when: one, being a girl in this world is hard enough, and two, we are both doing what makes us happy. Why hate on someone for traveling down the road they were meant to take, ya know?
You don't have to believe a single word of this if you don't want to, but if you take nothing else from this letter, please take this: Never take the little things he does for you (like the late night Facetimes while you're apart, the songs he sings to you in the car, and silly pictures together) for granted. Never lose sight of all he is. The passion and love in his eyes will leave you breathless; his strength will make you weak at the knees.
I trust him to do what he thinks is best for his life. If that means being in love with you, then there is nothing I want more for you two to be happy together. I promise. All I ask is that you make him happier than I ever could, and enjoy the ride.