accepting feelings without requiring an explanation

Earlier this year a friend of mine had a conflict with her partner in which she felt that she couldn’t fully share with him how she was feeling on all issues. After all, when she did freely share how she was feeling then her partner would then ask her to explain why, and she wasn’t always able to communicate everything she felt. He was often unsatisfied with her explanation, and would then argue that she shouldn’t be feeling what she’s feeling for the reasons that she gave. She felt stifled by this, and started to close off from him.