The actress - who plays Rachel Berry in the musical TV drama - has lots of steamy embraces with Cory Monteith, who plays Finn Hudson, but insists partner Theo Stockman isn't the jealous type.
She said: "My boyfriend is an actor as well. So he understands. Cory and I are such good friends that we've passed that level of weirdness. Cory farts in front of me!"
While she is happy in her personal life and starring in 'Glee', Lea recently revealed how she finds it "hard" living in Los Angeles and goes home to her native New York as often as she can.
The 24-year-old star said: "I miss it. A lot of kids go through life trying to figure out who they are. But when you grow up in New York, you figure it out, because you can be yourself there. I feel like you can't be yourself in Los Angeles. It's very pretty when you visit, but if you're a real New Yorker, it's hard to live in Los Angeles. I don't like to do a lot of the things that girls like to do here. I don't go to clubs. I have a very quiet life."