It takes courage to walk away from people who aren’t good for you. Our neural pathways are strong. They have been formed over years of repetition.
Breaking old bad habits is hard. You feel uncomfortable. Here’s my recommendation: just sit with the discomfort. It’s a feeling, nothing more. It will pass. When the discomfort returns, and it will, sit with it. The uncomfortable feeling will leave, sooner than the last time.
Eventually you will conquer the discomfort, if you don’t give up. Just keep going…