“You dont have to live forever just live.”

Variant: I don't want to live, I want to love first and live incidentally.
Source: Dear Scott, Dearest Zelda: The Love Letters of F. Scott and Zelda Fitzgerald

Source: The Great Gatsby

Variant on aphorism "Study as if you were to live forever. Live as if you were to die tomorrow" pre-dating Gandhi, variously attributed to Isidore of Seville (c. 560 – 636), in FPA Book of Quotations (1952) by Franklin Pierce Adams, to Edmund Rich (1175–1240) in American Journal of Education (1877), or to Alain de Lille in Samuel Smiles's Duty https://books.google.com/books?id=33UzAAAAMAAJ&pg=PA363&dq=live+die+tomorrow+learn+forever&hl=en&sa=X&ved=0ahUKEwjd3s_2m57MAhWFMGMKHe-sAl8Q6AEIHDAA#v=onepage&q=live%20die%20tomorrow%20learn%20forever&f=false (1881).
The 1995 book "The good boatman: a portrait of Gandhi," states that Gandhi subscribed "to the view that a man should live thinking he might die tomorrow but learn as if he would live forever."
In his 2010 Boyer lecture Glyn Davis (Professor of Political Science and Vice-Chancellor of Melbourne University) attributes the quote to Desiderius Erasmus. "He [Erasmus] reworked Pliny to urge 'live as if you are to die tomorrow, study as if you were to live forever'. Many students obey the first clause - the best heed both."
There is a similar quote by Johann Gottfried Herder: "Mensch, genieße dein Leben, als müssest morgen du weggehn; Schone dein Leben, als ob ewig du weiletest hier." ["Man, enjoy your life as if you were to depart tomorrow; spare your life as if you were to linger here forever."] (Zerstreute Blätter, 1785).
Disputed

They Call Me Coach (1972)

To hesitant guards at the battle of Kolin https://en.wikipedia.org/wiki/Battle_of_Kol%C3%ADn#Battle, 18 June 1757
Attributed in E. M. Knowles, Oxford Dictionary Of Quotations (5th Edition) (Oxford University Press, 1999)
"Kerels, wollt ihr den euwig leben?" Frederick the Great, by David Fraser, Penguin 2000, p. 353 Other versions have it: "Hünde, wollt ihr euwig leben?" (Dogs, do you want to live for ever?).
Attributed

Source: Between the Strokes of Night (1985), Chapter 29 (p. 342)

The Book of Positive Quotations By John Cook, Leslie Ann Gibson (2nd ed. 2007), p. 283.
Attributed