“时间长了 他们就有感情了”用英语怎么说？？

As time went by, they fell in love with each other.
也可以说Over time, they had feelings toward each other.但第一种更好.

they will love each other when living together for long.

Time has grown them having had affection

确实时间是爱情的药剂

The Accumulating,they will love with each other