It means a lot to me that you came to my place. 你能來我這兒對我很重要。
I don't know what to say. That means a lot to me. 真不知道該說些什么,這對我很重要。
That means nothing to me. 這對我沒有意義。
It doesn't mean anything to me. I don't care. 這對我一點意義都沒有,我才不管。
Happy birthday sweetheart. I love you. 親愛的,生日快樂,我愛你。
It means a lot to spend the day with you. 生日當天能和你一起過對我很重要。