Hey Commander, welcome to the forum. Congratulations on finding your way back out of Islam

As an ex-convert, I had the same thoughts going through my head when I left Islam. I never could figure out how to tell my Muslims friends, so I ended up just gradually no longer keeping in touch with them. They eventually figured it out, and some of them asked me directly if I was no longer a Muslim and I confirmed it. Some didn't care at all, some still have me on facebook but we hardly talk at all (definitely not like we used to). One initially expressed a desire to try to convince me to come back to Islam, but we never got around to having the discussion, although I was prepared to do so patiently and respectfully. And then there are those who pretend I no longer exist, because to them I may as well not. The person I was as a Muslim is no more.
As for my family, I wrote up a short note and emailed it to everyone. I'm lucky to have family who are for the most part very accepting of the various lifestyles everyone has. And even those who strongly disagree on things like religion, there is never the sort of animosity that would cause people to be disowning other people, etc. It felt embarrassing anyway, because as a Muslim I was arrogantly sure that I had the truth and they all were wrong. But I decided to just take the plunge and tell everyone I changed my mind about Islam, since they were all going to find out eventually anyway.
Here's the note I sent them:
To my dear family:
I want to thank all of you for your loving support during my journey as a Muslim for the past 7 years. I know many converts who are not so lucky. You guys are the best!
My time in Kuwait has given me many valuable experiences, one of the most important being an opportunity to learn about the real Islam. I will simply say, I have found it is not for me.
I'll be returning (home) on June 27, and leaving Islam behind. I can't wait to get home and see you all!
Love,
Luthiel
And the response I got was overwhelmingly positive. Almost nobody mentioned my change of religion at all, just that they were excited for me to come home and would I please bring some delicious Middle Eastern treats with me

My sister in law did say she was proud of me for having given it a try and for taking the time to search for what I believed in, since many people don't bother. I really appreciated that.
All in all it ended up being pretty anticlimactic. I hope that helps you and anyone else figure out how you will tell your friends and family.