To the OP: How does falling out of love fit into all this?
Ah yes, the old language thing. I read somewhere, some years ago, how other languages do NOT use "love" like we do. Loving your wife or your mother are two different things. As is loving pizza or loving a song. If memory serves (and it may not) I think they were referring to the French language -- which does not use the word "love" for all those things.
I have no idea of how you think that "falling OUT" of love fits into this. But I would be interested to know how you would explain "falling in Love" other than romantic.
Anyway, as fair as Love in the English language, is concerned, C.S. Lewis describes four kinds of Love. You can google it if you have any desire to do that. Oh, and speaking of "desire" that is definitely a part of the "falling in love" kind of love. One of the best!
So if anyone wonders if they are in love...then think on that.