Rey Mysterio has written a tribute to Eddie Guerrero that is sure to bring a tear to the eye of every wrestling fan. The camaraderie between the two stars is well known, and the love they shared, the brotherhood, and the journey on the road have always been among the most emotional parts of their WWE journey.Rey Mysterio confessed that he is always going to be Eddie Guerrero's little brotherEddie Guerrero died at a heartbreaking 38 years of age. His tragic death left a hole in the wrestling world that has never been filled. In his letter to Guerrero in The Players' Tribune, he said that the legend had never been able to see 40, but that, even now that he was 50, he was still Eddie Guerrero's little brother. He said that no matter what happens, he will always be his little brother."You didn’t get to see 40 … that’s still painful to think about. Me, on the other hand, I turned 50 last December. Nahhhh I can already see the evil grin on your face, hearing that. “50?!? 50?!? Oh Rey, no…….. You OLD.” I know, WeeWeeto. It’s true. But I’m writing this to you now, and I swear: I could live another 50 years — and when it comes to our friendship, I’d still be Little Bro. I’m forever your little bro."Rey Mysterio is heartbroken that Eddie Guerrero never got to see his daughters grow upWhile Rey Mysterio spoke about many things, he admitted he was most heartbroken that Eddie never got to see his daughters grow up."Your daughters … that’s the biggest thing. Of course, I’d trade every moment I wish I could have had with you, for just that — for you to have gotten to see your daughters grow up, and into the women they are. I won’t speak too much on them here, because it’s not my place — and no doubt they’re giving you updates themselves. But you should feel proud, WeeWeeto. You’d be a proud papa."Now, one of Guerrero's daughters has already started her wrestling journey. It goes without saying that his presence today would have changed everything about the wrestling world we know today. Mysterio's raw emotions are evident throughout the letter to Guerrero.