That's nice to hear, I can also say yes to that question on a daily basis, and I actually ask myself that on a daily basis. In fact, I start my day, every morning, thinking about and being grateful for what I have in my life - in fact, that I actually have a life also!
Resigning, that's big news so I understand why you wish to savour the moments with people you have become friends with. I wish you all the best for your impending resignation and your ongoing and successful future.