To the One I Let Go

I think about you on rainy days. Not because you loved the rain, but because I do, and I associate everything good with you now. I wonder if you're happy. I wonder if you think of me too. I hope you found someone who deserves you. I hope you don't hate me for how it ended. I was young and stupid and scared. If I could go back, I'd hold on tighter. But life doesn't work that way. So I'll just say it here, in a letter you'll never read: I'm sorry. And thank you. For everything.