Not sure why downvoted. I'd say if a fixation comes with voluntary self-isolation it shows that something is amiss, although it might not be the lack of love.
I found that I very much hide inside of my obscure interests when subconsciously talking about important stuff with my loved ones.
Oh wow. Yes, I didnt think that either. Some people probably felt called out or misunderstood what I meant.
Obviously, it can be a range of things. I tried to factor in what things are displayed in animes a lot. Often its success, reliable plot, emotion, sexuality, etc.