My life didn't turn out how I thought & it's my fault

I was a great kid until I hit 14. I had so many great friends that were going places. Friends that were good for me to have in my life. I dropped them and went to the "cooler kids" because it was "more fun". Little did I know, it would be temporary..and I'd be left with no friends in the end. A friend I had since I was younger..she was always a wild card..and we found each other again at 14. We would smoke weed and drink. From that point I made friends with more "fun" people. It wasn't until I had my first child at 19 (with my current husband that I was with for about 3 years before) that I finally saw them all for what they really were..losers. They weren't growing up at all, so one by one I dropped them. I stayed friends with only one, and I only did this because she wanted to be far from them as well and live a better life. We are still close friends, but we now live far from each other. I've tried desperately to find new friends..and it's been difficult. I am a sahm, so I don't even have coworkers to befriend. I've made myself so approachable but I am shy..so it's hard for me to just walk up to people. I just regret that chunk of my life because now the friends I dropped at 14 are getting .married and having babies. I've only been part of one wedding..my sister's. Only been to family member's baby showers. I see via FB they're having friendsgivings and Christmas cookie making parties. I'm so jealous, but I did this to myself. I'm just so lonely.