Curious Suicidal Immortal

What is it that makes me choose to live another day?
And what is it that keeps me from pulling the last straw and leave the pain and suffering behind?
After all, eternal peace will come for everyone one day, and there is no way to avoid it...
Well, unless I'd have the means to chat death indefinitely...
Then the pain would never end...
But in theory I could live until the end of the universe, but it would require incredible amount of effort.
And what good would it do to live forever and still contemplate ending my own life every passing day?
What would be the drive to motivate me to live day after day, for as long as my immortal state persists?
Would the goal of ending world hunger do?
Would keeping history true for thousands of years as a time keeper do?
Maybe leaving on a thousand-year journey across the galaxy to search for other life do?
Would it be a sin against humanity to not try to achieve artificial everlasting life?
What would be the most logical method of avoiding death forever?
Would preserving the central and the peripheral nervous system give me the illusion of never dying?
But would that still give me the right to call myself human?
Would religious fanatics try to hunt me down for misunderstanding the God's word?
And what if humanity evolves far beyond the current state, and as a million-year-old living organism I become an underevolved primitive being in their eyes?
Would that make me a little anxious and withdrawn at parties?
Would there be more like me who choose to live to see the end of the universe?
Would they be able to keep their sanity for so long?
And would I?