Here's my advice. Hug everyone you love a lot tighter. Never leave someone in an argument. Be present. Say I love you way too much. Take a lot of pictures with the ones you love. You never know when it'll be the last time you see them so please don't take any second for granted.
You don't ever have to feel guilty about removing toxic people from your life. You don't have to make room for people that cause you pain or make you feel small. If a person disregards your feelings and always sees themselves as the victim, then they need to go.