In that regard, I feel like I'm well positioned for immortality, because I'm so busy! :-)
If everbody could live forever, then definitely no. Think of the constant wars that would instead limit human lifespan.
If just me and nobody else, under what conditions?
If the normal aging process continues, then definitely no. Being alive in a decayed and constantly decaying body doesn't sound attractive.
Even if your body remains fixed at some level of functionality, including a sane personality, the boredom would be intense. Watching all the people important to you constantly dying would be a source of pain.
So, on the whole, NO.
If I could restart at about 20... oh yeah.
smells of a spam/marketing account pretending to be a user