How can I get rid of my insecure feelings?

I read a book once that helped me to change my thinking:

"What To Say When You Talk To Yourself"
By: Shad Helmstetter (not sure of the spelling?)

We don't 'just' think or talk our way out of our insecurities.

Confidence comes from 'doing' too.

... and from acknowledging and 'owning' the good things we do, and the good parts of ourselves.

We too often want to downplay or diminish thinking we're not good 'enough' or 'worthy'.
Try to watch for those in your thinking, and replace them with a more healthy and "truthful" thought.

One other thing that I do, really it's true!
I literally reach around myself and give myself a pat on the back whenever I think I deserve one.

... and a hug, when I need one!

Works for me.

Wish you well!