Common Causes Of Depression In Your 20s, 30s and 40s
30s: Losing friends to marriage, kids etc.
In your 30s, even if you do have a solid friend group, you may find you spend less and less time together as people get married, take on more responsibility at work, and have children. Traditions like weekly brunch with your girlfriends may begin to dissolve, leaving you once again feeling community-less (like you did right after college). This is, one again, a good time to explore new hobbies and interests, as well as dedicate more time to the few friends who do have time for you.