I want to offer a counterpoint to the above. I think that for some people in some circumstance it is true, but you can absolutely have fulfilling relationships with people you spend a lot of time and attention on, both friends and romantic partners. I think a lot of people get stuck in the classic avoidant + anxious attachment styles, where people chase what they can't have, but thats not everyone.

I'm not sure how much I actually agree with attachment style theory, but I do observe the pattern parent points out in some people, that they chase people who are distant or unavailable. But its often unhealthy for both people