The couple began dating after working together on Glee, with Michele later claiming that nobody "knows [her] better than" Monteith.
Speaking to Life & Style, Michele described Monteith as the most trustworthy person in her life.
"I really think finding someone that you are best friends with is the secret," Michele explained to the publication.
She then declared: "I'm dating my celebrity crush!"
Michele also previously credited Monteith with inspiring her to become a better actress.
"He really, really inspires me, and he motivates me and I think he's just so talented," the actress said.
Glee airs Thursdays at 9/8c on Fox.
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