I'm sticking with you.我要和你在一起。

A: I'm sorry that I caused so much trouble.
很抱歉我惹了这么多麻烦。
B: Never mind that. I'm sticking with you.
没关系，我站在你这边。

Just put me out of my misery. 别丢下我不管。/ (说些想听的话）让我感觉舒服些。/安慰安慰我。

A: Jason, you look terrible today.
杰森，你今天看起来很糟糕。
B: I feel terrible. Just put me out of my misery.
我感觉很不好，别丢下我不管。