英语是： fall in love。
解释：
fall in love 英[f?:l in l?v] 美[f?l ?n l?v]
[词典] 陷入爱河; 爱上；
[例句]Slowly but surely she started to fall in love with him
虽然过程缓慢，但她无疑开始爱上他了。
I must have been crazy to fall in love with you!
我当时爱上你一定是疯了。
I fall in love.
我谈恋爱了。
Did you fall in love with him?
你是不是爱上他了？
Then, I know you fall in love.
那时，我知道你恋爱了。
I fall in love with you There's nothing, nothing I can do.
我爱上你了，没有什么，没有什么我能做的了。
Oh, guy, you fall in love with her!
哦，伙计，你爱上她了！