fall in love idiom
B1 相爱，坠入情网
to be very attracted to someone and begin to love them
They met and fell madly in love. 他们相遇并疯狂地坠入爱河。
He fell in love with a young German student. 他爱上了一个年轻的德国学生。
I thought I was falling in love. 我想我堕入情网了。