What would you change if you knew you were never going to die?

I would first change my perception of time, being that I would live forever I would have to adjust to the fact that I would never age. I would try to use my everlasting life for something constructive, other than just breathing in oxygen and releasing carbon dioxide. I would try to make a difference no matter how small that difference may be. I would live each day as it were my last and not to just exist. Life is precious and we shouldn't waste it, especially if we can live forever.

Figure out why...and if other people out species is capable of immortality, or if I've just been chosen by Jesus or something.

I think I'd also start searching for multiple ways to end my life. I mean if my head gets chopped off...am I still living? Lily I don't understand !?
Infinity is not something my mind can comprehend...probably because I'm not made to live for infinity. Though I think you're right about doing something constructive. I bet you'll see the world progress a lot and then probably be destroyed somehow .

...though all the people I care about will die and I'll miss them(ya that makes more sense now). Like you, if I cared for you enough