What about visiting meetup.com...it's a site where you can type in your interests and it tells you if there is a group near you, who meet to do a similar hobbie. Ie: Girls Night Out, book club, hiking club, etc. It might be worth a shot.

Is there any one you work with that you might want to go out with after work? For example, there area a few people I work with that I have extended invites for drinks (with the group of us) after work, or if they ever need to get out for a girls night, etc....sometimes that's tough if you don't have something planned that you can automatically invite someone too. I work at a school, so sometimes I go to school-related events to support the students and I can mingle with other staff.

I think once you are out of school/college, it's tough to meet people and find a circle of friends. You aren't alone hun.