The Glee star was dating Monteith when he died of a drug overdose, and after a difficult second half of 2013, she opted to take a break and treated herself to a relaxing holiday with her best friend Jonathan Groff.
She now admits that online remarks about her planned break left her saddened and hurt.
She tells Britain's Glamour magazine, "People were posting the most horrendous things. Things like, 'You're cheating on Cory'. But a lot of my fans are young and they can't understand. People are going to have to get that I am 27 years old and that I have my whole life ahead of me."