两个人才叫情侣分不开才叫爱情
[liăng gè rén cái jiào qíng lǚ fēn bù kāi cái jiào ài qíng]
Expresses that a couple (two individuals) makes up what we call 'love'. For it truly be considered as love, a pair shouldn't be separable under any circumstances; this emphasizes true commitment and undying affection between partners.