Turning 30 was pretty rough for me. I was getting divorced and I felt like I had never been further from having a family and career. There's not much to do besides move forward though, and I'm lucky to have really good friends and family. Even though I was on the other side of the country from most of my close friends, I had a couple friends in CA that really stepped up to the plate for me. And I came home for a weekend and every single friend that I invited came out to celebrate my birthday.
It's not like problems just go away, but having the right people around can make it easier to continue working toward something better.