相亲相爱用英语怎么说？

相亲相爱
be deeply attached to each other
be kind to each other and love each other devotedly

同学们相亲相爱，关系十分融洽。
The students are very friendly and get on very well together
老夫妇俩相亲相爱，没有破过一回脸。
The old couple love each other dearly and have never quarrelled with each other

love mutually

fall in love

dear to each other

fall in love with each other deeply.:)