In this thread: people mistaking NRE for "true love"
Love is as much a time based thing as it is work/romance/sex/chemical.
It involves seeing the other person at their weakest and being there to help them, and vice versa. It involves seeing them mistreat you, but you know why because you know them and their triggers and forgiving them. (That last bit can be confused with forgiving abusers, which is not the same. If someone physically hurts you, it isn't love, and contrition is a required step.)
It involves giving them freedom to make mistakes and hurting themselves and being there to help them up.
It is so much more that delineating it down to ' I must love them cause I'm not sexually attracted to anyone else right now' is a cheap and sad way of describing love.