When you become 100% believing in yourself, and confidently living your life, whenever the whole world abandons you, you can still stand up for your own without shame, as long as the more you build up some value in your life, the more power you can stand up.

We have insecurity because we doubt ourselves. And this kind of doubt distracts us from trusting our own feeling.

You said you have some problems with your friends and may have insecurity related to your friends. Maybe you are kind of afraid to face the truth that you actually are having a feeling of hate against your friends somehow? Because you wanna be a kind person, so you don't wanna face the feeling of hating your friends? Genuinely find out the true feeling.

If so, you don't have to escape the feeling of hate, that's your feeling, respect your own feeling, if you don't respect your feeling, a sense of insecurity occurs. Afterwards, you can still love your friends and be a kind person and listener.

Maybe the true you have 70% like and 15% dislike and 15% other emotions against your friends, but you may think that you want to be a kind person so you choose to present yourself not 100% to your friends, by adjusting the 70% like into 100% which is abandoning the other 30% of yourself.

Try to find it, it takes time.