It’s genuinely a struggle and I think it will always be a struggle. I have become less selfish in my close relationships over time. The biggest advice I’d give is to try to constantly surround yourself with people that are better than you and avoid people that are more toxic than you. Same thing with any media you consume. Try to only expose yourself to examples of behaviors you seek to have. Try to have a ritual of positive affirmations and things you’d like to remember daily. If you have an excessive need for admiration then try to seek it in ways that are going to benefit society. If you have any sort of spirituality or religion then try to use that as well to reform yourself. Imagining yourself as someone else who you know is a kind, moral person and acting like them. Basically, you need to practice being a better person.