It's easy to act colder than him, otherwise you will try your best to please him and be very tired in the future. In fact, he may be deliberately indifferent, that is, the so-called cool kind, or this is his character. You just have to grasp the scale, you can't blindly please him, and you can't be cold to others. It's very effective to be gentle when you are soft and coquetry when you play the role.