I might be messed up, but I know what's love

我可能会搞砸一切 但我知道什么才是真正的爱

Mess up 弄乱，弄糟; 搞乱; 搅乱

例句：

He got another chance and didn't want to mess up again.

他又获得一次机会,这次他再也不愿意把事情弄糟了.

He didn't want to mess up the situation.

他不想把事情弄糟.

She used to mess up the floor and I had to clean up after her.

她过去常常把地板弄得很脏乱，而我不得不为她清理干净。

If you wanna fix me, then let's break up here and now

若你还想要修补我的心伤此刻就一刀两断吧

break up结束;（使）破碎;放假;（使）散开

例句：

Break up the chocolate and melt it.

把巧克力弄碎，使其熔化。

It's the last week before they break up, and they're doing all kinds of Christmas things.

这是放假前的最后一周，他们正在为圣诞节作各种准备。

Rubber bullets were used to break up the demonstration.

橡皮子弹被用来驱散示威人群。