It doesn't matter to me what you do.

你做什么我无所谓。

《牛津词典》

It doesn't matter to me anymore.

这对我来说已经不重要了。

youdao

It doesn't matter to me whether you go or not.

你去或不去，对我都没关系。

《新英汉大辞典》

For me to have a moral feeling towards you means you matter to me.

要我对你产生道德情感,也就是说我对你不是无动于衷的。

耶鲁公开课 - 心理学导论课程节选

It just doesn't matter to me that it's me, anymore than it would matter to me if they just tell me, "Oh, there'll be somebody else around there " who will like Chinese poetry."

是不是我已变得不重要，不过是有人告诉我，“将来会有一个人,他喜欢中国诗词“

耶鲁公开课 - 死亡课程节选

But refining in just the right way is going to turn out to be a surprisingly not straightforward matter, at least that's how it seems to me.

但是让人惊讶的是，要正确地修改它,并不是那么直接而简单的，至少在我看来不是。

耶鲁公开课 - 死亡课程节选

There's no, it doesn't matter to me or you, who the Governor of Idaho or Wyoming is.

NPR: Political Wrap: DeLay Primary, Domestic Wiretapping

And as for the other resolution to spend more time with people who matter to me?

FORBES: My Not Yet Quantified Self

And if they are, it doesn't matter to me if what they're doing can be called useful or not.

CNN: Jay Silver: How to control a computer with a banana