Well since I'm not the writer I wouldn't know, but I doubt they would kill him off the series would be over and sad if he did. I've read the books, and although they're nothing like the show, Stefan doesn't die
No he will not, because Stefan saves him. He finds a cure (or will it be too late).
He has the iphone.
Stefan Henszelman died on October 2, 1991, in Copenhagen, Denmark of AIDS.
Stefan Hnydzinski died on October 2, 1939, in Warsaw, Mazowieckie, Poland of killed in air raid.
Stefan Hatos died on March 2, 1999, in Toluca Lake, California, USA of heart problems.
Yes Stefan does marry Alana. Stefan and Alana got married in the 4th season of The Vampire Diaries. But in the 3rd season they got engaged and now they are married.
Stefan Lorant died in 1997.
Stefan Kopec died in 1941.
Stefan Meier died in 1944.
Stefan Giller died in 1918.
Stefan Böhm died in 1813.
Stefan Żółkiewski died in 1991.