My understanding is "live with it till you can't stand it."

Since now is still Chinese/lunar New Year, I guess the last question sentence of your responsive sentence was “你过节要过到什么时候？” (Until when do you want to celebrate Chinese/lunar New Year?) (All I know is the main verb of the question is 过, so there may be other possibilities.) So your friend answered, “Until anytime as long as you (or I/he/she, we cannot get specific subject from your sentence.) want.” Just a guess, hope it can help you :)

我觉得这句话要有背景才好理解。 I think I need to know the related context of this sentence.

这和What are you doing now？真心没有什么关系。 这句话的结构是“想＋过到＋什么时候＋就＋什么时候＋呗”，那就是“随心所欲”的意思，这个“过”字这个语境下应该是和“过年”有关的。

没更多可参考的，不好说具体的是什么意思，但有一点，绝对和what are you doing now?没有一点关系。你的朋友不是在骗你，就是他自己也不知道是什么意思，但他不可能不知道这句话是什么意思，所以，他肯定是在……。