Social anxiety

Anybody else struggle with this? When I was 18-19, I had a few friends and found out they were fake. They even slept with my boyfriend at the time behind my back. I was so done with it and moved away. Ever since then, i have struggled with social anxiety. I’m not sure if that’s the reason but I struggle to go out and meet new people. Like it scares me to think about it. I just had a baby a month ago so I really need mom friends but I’m afraid. What has helped you overcome social anxiety?