How can you distinguish between really loving them vs falling in love and being in love?

There is loving them, falling in love and being in love. The 3 of them seem similar but aren't.

Obviously falling in love isn't the same as it's more about infatuation (similar to having a deep crush on someone but at multiplied by 10x), which is pure attraction and fantasizing about them too much. You can fall in love but realize later on that's not love. You didn't really actually love them. However is loving the same as being in love? Or different and if so is there a way to distinguish them?

How can you distinguish between really loving them vs falling in love and being in love?
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