I agree with Rapunzel....if you choose to tell a friend, I would take baby steps until you are officially diagnosed....explaining you're under a lot of stress lately and feel you need to talk to someone objective and outside the 'familial unit/friend unit' but that you feel close enough with your friend to share what's going on with you. It's kind of like prepping your friend (testing the waters) for when and if you are diagnosed, no matter what the diagnosis is.

Just remember, you need not share everything right off...we do tend to get giddy when we think we've finally solved the riddle that has been us all our lives...so be careful. As Rapunzel said, you've not been diagnosed with anything (although, just as with me, all the symptoms seem there)...just try not to put the cart before the horse....really hard for the beast to pull that way, and most resent having to push the cart up hill! lol

You've got a plan...so act on it...remember, always that we are hear if you need to vent or share things you're not entirely comfortable sharing with your friend yet, until you are.

Take care...