Fetching details from the dictionary...
to fall in love (with); to fall for; to become enamored (with); to be taken (with)
to be attracted (by); to be charmed (by); to be captivated (by); to be impressed (by); to admire
to forget oneself; to be entranced (by)
彼女に一目で惚れた。
I fell in love at first sight.
彼の優しさに惚れている。
I am in love with his kindness.
思わず惚れてしまうほどの美しさだった。
It was a beauty that made one fall in love involuntarily.