爱而不得却心有不甘。
一种惋惜，通常是你感觉自己应该做到，想要做到，或可以做到却没有做到。
一种遗恨，由无法控制的或无力补救的情况所引起的对过去行为的深切自责。
常用来表示不满：所提出的条件太高，我们不能接受，深表遗憾。
Unable to love but unwilling to do so.
A kind of regret, usually when you feel that you should do it, want to do it, or could do it but fail to do it.
Resentment is a deep feeling of self-reproach for past actions caused by circumstances beyond one's control or beyond one's ability to remedy.
The conditions proposed are too high, we cannot accept them, and we deeply regret them.
