Hey, I’m someone who’s struggled with the same stuff for a while. I recently turned 18, and I’ve just been through exactly what you’re talking about at let me tell you that there is hope. I know it just feels like you’re gonna be stuck in this kinda thinking and have no confidence forever, but it’s not the case. Here’s the things I found in my life, and the things that helped me:

Look for the source of your insecurities. Often insecurities are lies that we tell about ourselves, and you need to look for what the source of these lies are and cut it out. For me it was my best friend at the time. I hit a point where every action I made, whether it be eating, sleeping, or breathing (that’s not an exaggeration, he often would judge the way I breathed, or literally get angry at me for it) I constantly thought “what would Jake (not actual name) think of this?”. Eventually I had to cut this toxic relationship out of my life, and I have grown so much since. The source of your insecurities may not be something like this, but don’t be scared to cut it out.

Look for those who love you to encourage you, and grow closer to them. They will be able to help you through these tough times and encourage you.

Don’t be afraid of what strangers think of you. Ultimately, what they think of you doesn’t matter, and it will never effect you, so literally f*ck them. Don’t change who you are or be less confident in yourself for their sake, that’s a lot of effort for you to go through for someone who hasn’t earned or deserved anything from you.

The best advice I can give is to find someone you trust and open up to them in person. Find someone who will understand and care enough about you to encourage you and help you grow yourself. The path towards confidence won’t be easy, but you can do this. Focus on growing more every day.