I happen to know quite a few people where a 'love interest' isn't at the top of their priority list of things important in their life.
I've known plenty of people who are like this at various times in their life, or even for always. What is interesting is that I've also known some people who tend to be most attracted (or get crushes on or whatever) people of this type.
My brother was like this in high school. He never had a girlfriend, because he always fell for female friends who were so focused on school, sports, activities, and whatnot that they didn't have TIME for or interest in romance.
Maybe some of this was because he was also very into school, sports and whatnot, and he was popular and had a lot of friends and activities, so it was "safer" to be interested in people he couldn't have at that time in his life. I'm just guessing, though, and I seriously doubt it was a conscious decision if this is true.
I on the other hand, tended to allow my feelings for guys to distract me from the things I *should* have been focused on at that age. I am a strong bonder who has always had a
very small inner circle of close friends and a wider circle of friendly acquantances with whom I'll share a specific interest or activity, but not an intimate connection. I don't even know
how to have that sort of in-between friendship most people take for granted.
So I tend to be happiest in a stable romantic relationship. I think it's because I'm a bit of an introvert, so I'm happiest when my best friend is also my lover/partner, because then I've got most of what I need emotionally in one place. I've never quite mastered that thing that most women seem to have--a circle of friends who drop by or go for drinks or coffee after work, or who call or text them several times a day with exciting thoughts and news, or who spontaneously decide to go to movies or whatever together.
So I'd darn well better have a romantic partner who likes the same kind of movies and activities and likes to talk about the same kinds of things (fortunately, I do).
The point is, everyone is different. It's not about right and wrong, but about portraying people with different needs, wants, and priorities in your stories.