Definitely depend on how I'm dying... but I'd probably be like this if for some reason able to speak without a sudden death.
"Now I hope you know... and remember how much love I shared with you... and everyone I touched... please keep sharing it... this world needs much love."
"This has certainly been... one helluva ride... I've had lots of ups and downs... things I did, things I didn't do... but I just hope you know... I love you all."
If It were going to be like, quick death,
"Just so you all know, I hope you know how much I love you right now, and I will treasure the moments I've spent with you."
"Can I just hug one of you... I want to go out loving someone."