be soft on (someone)

1. To treat someone delicately, gently, or leniently; to not criticize, punish, or berate someone too harshly. You should be soft on Bill, it's his first day in the office. You're too soft on those kids. They need more discipline or they'll get out of control! Come on, if you're soft on these guys, they will continue to steal from the company!

2. To be romantically interested in or infatuated with someone. I think John's soft on Samantha, I hope he asks her out on a date! I've always been soft on Abigail, but she's just doesn't seem interested in me. Tom's always nicer to Kate than anyone else. Think he's soft on her?