Hey there,
So it turns out you're the lucky one. You're the lucky guy who will soon become my best friend's husband. I'm not going to lie, I'm a bit jealous and kind of not liking you right now. I am jealous because my best friend will soon be spending all her time with you and not me. I am kind of not liking you because it turns out I'm no longer the number one person she can count on. However, I am happy for her and for you. I am happy that after countless nights of talking about our future husbands, she has finally found hers. I am happy for you because you couldn't have found a better girl to spend the rest of your life with. She is my sister, my best friend and my person. I love her with all of my heart, and it feels me with joy to know you love her as much as I do.
Our days as a dynamic duo are counted since soon it'll be all about you two instead of all about her and me. Our days of staying up all night talking about our troubles are soon to be gone since it'll be you listening to her instead of me. Although I am happy for the both of you, I cannot help but feel sad as I realize there will be no more Chinese-food date nights and no more Bachelor in Paradise marathons. I guess what saddens me the most is realizing she no longer needs me. I will forever be by her side, but once you become her husband, it'll be you coming to the rescue, not me.
I am sad, but I am also excited. Right now, it feels like I'll soon be missing my best friend, but then I remember that once you two are married, I'll be gaining a brother. Yeah, that's right. I'm not going anywhere! I will be here to advise you when you don't seem to know what you did wrong. I will be praying for you when ever you piss her off, because let's be honest, she's scary when she's mad. I will forever be here as her bestfriend and as a new best friend to you. When you think you messed up, I'll be here to help you figure it out. When you're trying to surprise her, I'll be here to make sure you blow her mind. When things get tough, I will be here to remind the both of you that there is no love more pure than the love I see when you two look into each other's eyes.
You are her one-and-only, and I couldn't be happier. I'm her Christina Yang, but you are her McDreamy. Please make her happy and never take her for granted. She is strong, but she's also fragile. Love her without any limits, and you will see her doing the same. Don't you dare hurt her or else you'll have to deal with me. Make her smile every day and give her the life she deserves. You're a lucky man, but I'm even luckier for having a best friend like her.