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Lea Michele, Matthew Paetz

Christopher Polk/GC Images

Things are getting serious between these two lovebirds.

News that Lea Michele had jumped back into the dating scene first came about nearly a month ago, and it looks like her new relationship is blossoming quite well. A source tells E! News that the Glee star and her beau Matthew Paetz attended a private house party in the Hills yesterday, and the brunette beauty took the outing as an opportunity to introduce the new man in her life to some of her nearest and dearest.

"Lea was leading the way and she couldn't wait to introduce him to friends," an eyewitness tells us of the hand-holding pair.

"They were talking to people about summer plans and looked like they were totally crazy for one another. Lea looked like she couldn't wait to introduce him to people."

The source adds, "They look so cute together and so into one another. She clearly really likes him."

The duo met on the set of Michele's "On My Way" music video shoot a few months ago. Paetz is the first person she's romanced since losing longtime love and former co-star Cory Monteith nearly a year ago. "She waited a long time before getting serious again and she likes him a lot," a source recently told E! News.

Another insider shared that Paetz "treats her really well, he's smart and fun. She's really happy."

—Reporting by Baker Machado