Stay at home mommy... how to meet other mommy's?

I am a stay at home mom. I used to have a million friends and be the fun, everyones buddy, life of the party, always on the go kind of girl. Not a bad girl just a fun girl. I always worked since I was 16 and able to get a job. I worked full time plus going to school, high school and then one year of college. I have been with my husband for six years and married for two years. I worked up until I was eight months pregnant. Now that I am married and have children and I'm mainly home I slowly lost my friends. Some I still have but the relationship is strained and different. None of my friends are married and none have kids. Friends of mine are out clubbing and partying. I am very mature for my age. I am 24 and I have responsibilities that I take very seriously. I wont go be part of that crowd just to hold onto my friends. I need new friends that are on my level. Friends with common interests. How do I meet new people? By the way for someone you used to be so fun and have so many friends this makes me feel really pathetic and embarrassed. And depressed. I would appreciate the advice, and by the way I feel very fortunate to be able to be home and raise my kids but I'm still lonely and jealous of all the friends my husband has... that's even more sad haha!!! Thank you!