This letter informs a person you've been friends with that you've fallen in love with them.
1234, Main Street
Boston, MA 02123
07 April, 2005
<Recipient Address Goes Here>
I don't know how to say this in a way that won't make you freak out, so I'm just going to say it: I'm in love with you. Surprised? So am I. We've been friends for a long time, going on <time>, and I never expected anything like this to happen. But it has, and I thought you should know how I'm feeling.
What do we do next? I have no idea. I think we should probably get together and talk, decide if we can still be friends, that sort of thing. Who knows, maybe I'll find out that you have some of the same feelings for me. Give me a call, OK? Let's talk.
encl: <List of enclosed items goes here>