《这个杀手不太冷》的主题曲是 Shape of my heart，其歌词如下：
1. 最深沉的爱，莫过于分开以后，我将自己，活成了你的样子。
2. 英歌词：He deals the cards as a meditation And those he plays never suspect
He doesn't play for the money he wins
He doesn't play for respect
He deals the cards to find the answer
The sacred geometry of chance
The hidden law of a probable outcome
The numbers lead a dance
I know that the spades are swords of a soldier
I know that the clubs are weapons of war
I know that diamonds mean money for this art
But that's not the shape of my heart
He may play the jack of diamonds
He may lay the queen of spades
He may conceal a king in his hand
While the memory of it fades
I know that the spades are swords of a soldier
I know that the clubs are weapons of war
I know that diamonds mean money for this art
But that's not the shape of my heart
建议您去音乐平台查找更准确的歌词，因为有些歌词可能存在误差或不同的翻译版本。