Definition (情感)
To begin experiencing romantic and sexual love for someone.
爱上（某人）
They met and fell in love while at university.
他们在大学相遇并坠入爱河。
Over time, she began to fall in love with her neighbor.
随着时间的推移，她开始爱上了她的邻居。
He fell in love with her the first time he saw her.
他第一次见到她就爱上了她。