hello again

I met an old friend yesterday. At first I didn't know how to greet this friend. Should I hug him? Should I act like nothing has changed and just embrace the fellow? Should I start asking questions and wonder where he went without contacting me? Should I be angry and reject this friend?
But, then I realized, that this friend makes me feel so good about myself. This friend compliments me and makes sure there is a permanent smile on my face. This friend always always made sure I had a good day. The past two nights my old friend has helped me sleep so well, I just want to thank him.
Oh Mr. Happiness, don't leave me ever again.