New to the world of loneliness

I'm a 15 year old girl and I haven't always been lonely. I was a very bubbly and outgoing child who was always making new friends and playing around with them. I'm not sure what happened but over the past few years I've been noticing changes in me. I'm not as fun and bubbly, I started to avoid my friends. I feel like I'm talking to myself almost all the time. I started to like games and spent almost all of my time playing. I never expected that my life would take this turn. I'm just wondering what triggered all this. I'm not sure if I should get help or family support, or maybe neither because it's probably not a big deal? Any thoughts are welcome!<br><br><br><br>Thanks <br><br>From r/lonely on Chambers, wish me luck :)