The 51-year-old actress admits she used to be a lot like her `Glee` character, menacing cheerleading coach Sue Sylvester, but thinks she is much "nicer" these days.
She said: "I was terrible. It was so Psychology 101 - I felt terrible inside and I projected it on everybody else. I made everybody bad, wrong.
"I was kind of shaming and humiliating, not unlike Sue Sylvester, so I had a lot to draw on. I wasn`t a nice person to have around. And I can say today, I`m kind of a nice person to have around!"
Jane - who is married to psychologist Lara Embry - is openly gay but admits she used to have a crush on `Happy Days` star-turned-director Ron Howard when she was younger because he was "not at all sexual".
She told `Access Hollywood`: "It`s a common - very common occurrence. Very safe guy.
"You know, [Ron was] one of those boys that is just a really nice boy. He`s not at all sexual, so, you don`t have to deal with that. No body hair. Like, if you look at Donnie Osmond and Davy Jones - they`re kind of like Ken dolls."