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Once you've done all your active content acquisition, once you've pitched some strangers, once you've written it down a few times, you need to stop actively working on the problem. Remove that sticky from your screen, hide those second drafts on your desktop, and just stop working on it. Yes, you need to make a decision, you need to respond to whatever the problem is, and while I am saying you should remove all the physical artifacts of your active soak, you're not going to stop. You can't. Your brain won't let you.
Back to the original flame mail from your friend. You've received these before and you know the absolute wrong thing to do is immediately respond. Of course, your animal brain is dying to do so because it feels so good to punch back, but it's never the right move because your animal brain is defending itself, it's not resolving anything other than proving boy, can I punch back or what? My advice regarding flame-o-grams and hard decisions is the same. Sleep on it.