I'm terrible sorry to have caused you so much trouble.

I feel much obliged to be troubling you thus (on such an occasion).

How to say 我觉得很不好意思这么麻烦你 in English? Informal: I feel really bad about bothering you. More formal: I'm embarrassed to have put you through so much trouble.

I'm very embarrassed to bother you

是想麻烦对方还是不想麻烦对方呀？