updated 05/10/2013 AT 7:00 AM ET
•originally published 05/10/2013 AT 7:15 AM ET
There doesn’t appear to be too public much information behind why Ian Somerhalder and Nina Dobrev split after several years, but a cryptic Tweet may give fans some insight.
Just before a source confirmed to PEOPLE that the Vampire Diaries stars called it quits, Somerhalder, 34, Tweeted, “A THOUGHT FOR TODAY: People change and forget to tell each other. -Lillian Hellman, playwright (1905-1984).”