How to be less dependent on your partner for happiness?

As someone who’s done a decent amount of research on relationships, how they function, and how to better a relationship, you should learn how to become more independent as a partner. Relationships require both parties to be able to sustain themselves, whilst providing to a relationship. Some small ways to better your independence is starting to make decisions yourself, wether that be picking out clothes that you don’t know if they look good on you, getting to know yourself better as in trying out new food to see what you like, or trying out new things to see what you like and don’t like, etc. i’m unsure if you can reply to this, but if you can, and want more tips, please let me know!