This may sound trite, but I think it's key: figure out who you truly are (not based on other's expectations....but really what values you have....what you enjoy to do with your time....your limitations....and what areas you can mature and grow in, etc).
Also....know what a genuinely healthy relationship even looks like. I've been reading Leslie Vernick's books recently and she sums it up well that a healthy relationship needs 3 essentials: mutuality, reciprocity, and freedom.
Three Essentials
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Mutuality means that both individuals contribute specific qualities essential for the care, maintenance, and repair of the relationship. They are honesty, caring, respect, responsibility, and repentance. In marriage, both individuals make efforts to grow and change for the welfare of the other and the preservation of their relationship.
Reciprocity means that both people in the relationship give and both people in the relationship receive. Power and responsibility are shared and there is not a double standard where one person gets all the goodies in the relationship while the other person sacrificially does most of the work.
Freedom means that in your marriage you are allowed to make choices, to give input, and to express your feelings without fearing you’ll be badgered, manipulated and punished. When freedom is present, we’re not afraid to be ourselves nor are we pressured to become something we’re not.