As we know, there are many different kinds of "love", and people often confuse "friendship love" or "brotherly/sisterly love" with "romantic love". Some or many people, perhaps even those who know the two well, take this to mean they are romantically involved, but contrary to popular belief, they are just friends.
The key to this trope is that though affection and even love exists between the two people, it of the two friends have (or probably ever will have) any interest in the relationship becoming romantic, unlike in the Just Friends trope which requires this.
However, one or more bystanders/others think that the love a romantic one and may try to call them out on it.
The two may be (but are not necessarily) Heterosexual Life-Partners, Platonic Life Partners or Like Brother and Sister.
I got angry, and told him never to talk to me again. He was the only boy I knew, who encouraged me to put God first in everything I do. He was also the only boy who had ever sacrificed something just for me.He was funny, and loved to feel like he was overly handsome. One day, he came and sat with me and we talked and talked. I felt like kissing him on the spot, but then obviously, I’m not that ‘type’ of person. I was just grinning like a fool when I said, “Thank You”.He then picked up a souvenir bracelet which I got from the leadership course, and broke it bit by bit in my presence. He gave me my best birthday present ever, cause it was so unexpected and sweet.Different to She Is Not My Girlfriend in that the two are not remotely romantically interested in each other, it is all in the eyes of the beholders.
For cases when the two turn out to be related, see Relative Error.Planning Dates Supporting Him Emotionally Maintaining the Relationship Community Q&A Some believe astrological signs can dictate personality.