In a healthy, non-enmeshed (not co-dependent) relationship, both men AND women should strive to be each other's "frosting," and not their "cake."
It took me a lot of years of work, but I finally realized that it's not only OKAY, but it's HEALTHIER for my attitude toward my wife to be one of "Hey, with or without you, this is my life's purpose, my journey, and these are my passions and interests. There is no one that I've met yet on this Earth that I'd rather walk that journey with than YOU, baby, but if it's not you I'll be okay too, I realize that now."
In fact, I'm STILL not there yet . . . but I'm working on it!