如果你不情愿地做某事，你可以说：

"I'm not exactly thrilled about it, but I'll do it."
"I'm not too keen on it, but I'll go along with it."
"I'm not exactly enthusiastic about it, but I'll do it."
"I'm not exactly excited about it, but I'll do it."
"I'm not exactly eager about it, but I'll do it."

这些表达方式都表示你不是很情愿地做某事，但你会去做。