If there is something going on with me, that I want to tell my best friend, I sometimes write a letter or even a long e-mail to him instead of actually taking to him at first.
Sometimes it's things that I just haven't been able to say to him (maybe I couldn't say what I wanted to to start the conversation, or maybe it's just because the right time hadn't yet presented itself - it's for various reasons really), and I want to, or at other times I just know exactly what I want to say, but I know if I tell him in person he might want to talk whilst I'm telling him this but I want to get it all out first without interruptions. Or, I might worry about what he's going to think whilst I'm trying to say what I want to say, so he gets the whole story first (and I don’t try and interpret every action his face makes whilst I’m saying what I want to say and have to ask him what he thinks every 30 seconds) and has the opportunity to think about what I've said before we talk.
Then once he's read the thing I've wrote, we discuss it like a pair of old women.