If only you hadn't felt compelled to meddle.

参考译文：只要是你没有感觉是被迫去干预就好了。

解析如下：

compelled 看作为形容词化的过去分词，形容词化的过去分词表示“被动动作结束后主语所处的一种状态”

(1)if only 只要...就好了

If only he would hold her close to him.  

要是他能将她拥入怀中就好了。

If only you had told me that some time ago.  

要是你早些时候告诉我该多好啊！

(2)feel compelled to do sth 感觉被迫做某事

If you still feel compelled to cyber porn - go to a professional.  

如果你仍然感觉受网络色情强迫吸引 - 找一个专业人士.

Athena : As usual, I feel compelled to restate the problem.  

照例, 我觉得有必要重申一下问题.

Only the morally weak feel compelled to defend or explain themselves to others.  

只有道德上的软弱才会觉得非得自我防卫或自我解释不可.

Dickens felt compelled to return to the stage for a final good-bye.

迪肯斯觉得必须返回舞台作最后的道别。

I felt morally compelled to help.  

我觉得从道义上我必须帮忙。

备注：感官系动词还可以换成状态系动词be

The enemy were compelled to lay down their arms.  

敌人被迫放下武器.

He was compelled by illness to suspend his experiment.  

他因病不得不暂时中断实验.

I was compelled to do so by absolute necessity.  

我因绝对的需要,被迫这样做的.