I feel like limerance is one of those current buzzwords that gets casually tossed around a lot without it having a sound basis.
Consider... What if I am limerant for you and you are limerant for me. We both have limerance, but we can be in a relationship until it devolves eventually when it isn't what either of us think it is... and we break up... We were technically never really in an actual relationship with each other, we were simultaneously in a fantasy relationship with each other's ideals... but nobody would ever know and nobody would ever accuse either of us of being limerant.
Meanwhile... I get to know someone else really well through casual contact at work or at a store or a club or wherever we see each other a lot. I actually know things about you that I like from those interactions. I ask you out and you go out with me. I really like you from those experiences and we become partners for a while... until one day I realize you are not who you presented yourself as being. Turns out I was in love with a fantasy version of you that wasn't real. Isn't that what everyone says limerance is? Except, you were presenting that false image on purpose and I thought it was real, even though I was wrong. I would never be accused of being limerant.
And then... I see someone and like her. I imagine ho it might be nice to be in a relationship with her. I tell her one day that I like her, but she doesn't answer. She doesn't avoid me either, so I assume she is just shy and so I periodically remind her I am still interested. Eventually she just goes away and never tells me anything and I never know what happened... but by then I've already become infatuated with her and the lack of closure confuses me and I wasn't rejected but wasn't accepted either. Is this limerance or just unrequited love? What's actually the difference? Nobody seems to be able to consistently define this.
Limerance just gets thrown out every time someone really likes someone who doesn't appear to like them back... and there's so many reasons that could explain what is going on. I once liked a girl who I thought liked me but then it turned out her parents had arranged a marriage for her already as is their country's custom. She never told me this, so I only found out third-hand and that led me to give up... but it may very well not have been an unrequited attraction, she may very well have liked me but was unwilling to fight for me against her parents wishes. There was not going to be a way for me to ever know so I had to give up and figure either she liked me and wasn't willing to fight for me OR she didn't like me... either way I wasn't in the picture.
I could go on and on... buzzword amateur diagnoses are a hot-button to me. I don't think it helps people to see all the discussions online and Youtube videos and "experts" claiming Limerance when a year from now they will all have moved onto a different buzzword trend to amateur diagnose.