07/09/2008 at 07:00 AM EDT
Three weeks after she headed to Arizona to receive treatment for anxiety and depression, Heather Locklear
is flourishing – but missing her 10-year-old daughter, Ava.
"The hardest part of all of this is being apart from Ava," says one Locklear friend. "But she knows she'll be better than ever, and that they'll both really benefit from this. She's feeling better, but it's tough."
Locklear, 46, checked herself in to the facility June 19 for an in-depth evaluation
of the medication she'd been taking for anxiety and depression.
While she appeared tired, pale and skinny
during lunch with boyfriend Jack Wagner during his June 29 visit, Locklear now looks "bright-eyed, alert and well-rested," says an observer. "She looks so much better [than a week earlier]."
In addition to seeing doctors regularly, Locklear has been riding horses, getting therapeutic spa treatments and taking quiet meals alone. She's also been buoyed by visits from Wagner, who most recently came to see her July 4.
Another bright spot for the actress? A recent week-long break in Bon Jovi's touring schedule meant Richie Sambora got to hang with their daughter, who has been "with family and continuing on with her summer plans," says the source.
"Heather's really happy that Ava got to spend time with her dad," says her pal, adding that Locklear and her rocker ex, 48, "are speaking all the time."
Despite their high-profile split, Sambora (whose East Coast dates with Bon Jovi start Wednesday in Boston before moving to New York on July 14) has been vocal about his support for his ex
Says the source: "They really have come through [the breakup – and are] on the other side."