如果变成了依赖如果只剩下习惯
[rú guŏ biàn chéng le yī lài rú guŏ zhĭ shèng xià xí guàn]
'If it becomes dependence, if only habit remains' implies when love transforms from passion into daily habit or dependence. The person probably feels the relationship lacks warmth now but has developed into an everyday necessity.