Dear John,
I know this is sudden and I know that I'm a coward for not telling this to you face to face, but I had to leave. I've been thinking about it for a while now and no matter how much I tried to deny it, because I didn't want to give you up, but you deserve someone better.
There are plenty of reasons why you shouldn't be with someone like me. I'm young and reckless and emotionally unstable. I have a dark past and I don't want to taint how pure and innocent you are by sharing that darkness with you. My job is a dangerous one and I don't want to risk you getting hurt because of it.
You deserve someone who makes you happy and someone who brings a smile on your beautiful face. You deserve someone who's there for you when you need them and someone who can give you a family, because I'm sure you'd be a great father and I can't give you any children. All that I have to offer is myself and you deserve so much more than that.
You're the day to my night and the sun to my moon and I can never brighten up your day like you do mine, but I wish you'll find someone who has the power to do that.
Please know that this wasn't a lighthearted decision and I wish someday you'll understand that it was better for you this way…
With love from Sherlock.
