The actress claimed that she received unjust criticisms from the press about being a 'diva', like her on-screen character Rachel Berry.
The 25-year-old told Nylon magazine: "I think I got hit with some pretty hard things at the beginning that were not good representations of my personality, and people put a label - I think they like to do that - and it really got to me.
"And I think I was fighting so hard to change that, that I was not really being myself. [But] I came to a place where I'm much happier personally in my life and because of that I really don't feel like I need to explain anything or be anything. I'm really proud of who I am."
The new season of Glee, currently filming in New York, is due to feature Kate Hudson in a recurring role as Berry's dance teacher.
Speaking of her new co-star, Michele said that she is "obsessed with her" and that she is "one of the greatest comedic actresses working right now".
Season four of Glee will be aired in the US and UK in the autumn.
Watch the Glee season four promo below: