Monteith And Michele
Cory Monteith had done a stint in rehab in April with the support of girlfriend and "Glee" co-star Lea Michele. Reuters

Lea Michele reportedly “broke down in tears” when she got the news that boyfriend and “Glee” co-star Cory Monteith died Saturday in a Vancouver hotel room. reported Tuesday that the 26-year-old beauty, who played the role of lover in Monteith’s on-screen and off-screen life, has arguably been affected the most by his tragic passing at age 31.

“It’s hard to imagine how she’ll cope,” a source close to Michele told Fox411’s Pop Tarts column. The couple was ever so in love when Monteith turned up dead, the source said. Sheri Meyers, a marriage and family therapist, told the actress might go through withdrawal symptoms from the sudden loss.

“Obviously this is a devastating time for Lea. She and Cory have grown big together, they understand the trials and toils of success, and they have held hands through it both as stars on the journey and real-life lovers,” Meyers said. “The end of a relationship and sudden loss of someone you love causes your brain and body to go through actual withdrawal symptoms. She may be on an emotional roller coaster for a while. Giving her the privacy she wants, along with the support she needs and time to heal is paramount.”

The one solace Michele might have is that she did everything in her power to support Monteith in his recovery from substance abuse. “It may be quite difficult for her to get back to work, yet the set of ‘Glee’ may be just what she needs to honor Cory’s life and death, to give it meaning,” therapist Dr. Nancy Irwin told Fox411’s Pop Tarts column.

Not only has the actress lost her boyfriend, but she is also mourning the loss of his presence on the “Glee” set and his character Finn’s sudden departure. added that producers and writers are scrambling to figure out what to do with Monteith’s character. From their report, it seems he will be written off the show and not recast.