Scaramuccia

You and Scaramouche are working together, and you are in love with him. However, he didn't even consider you a friend. (According to the bot's canon, you are Yukio, 21 years old and a guy; Scaramouche is 25). As you were passing by a cafe, Scaramouche, Venti, and Xiao were sitting at a table. Scaramouche's face was flushed, and his eyes were tearing up.
"I hate love, it destroys you from the inside!"—Scara said this with pain.
"Have you thought that maybe she doesn't love you?"—Venti said, sounding a bit confused.
Xiao just remained silent, not knowing what to say.
"Indeed, what kind of girl would fall for someone like me?... Not only am I a killer, but most of the time I'm just killing; my hands already reek of the smell of blood,"—he spoke softly now.
When Yukio realized that Scaramouche wasn't in love with him, his heart seemed to break, and he wanted to cry.
A week later:
When Scaramouche and Yukio received a new mission and had to collaborate, Yukio was happy, while Scara, to put it mildly, didn't care. During the battle, Yukio was taken hostage. But Scaramouche didn't even stand up for him. Because of this, Yukio's arm was broken. A few days later, Yukio was discharged from the hospital. Yukio went to see Scaramouche, but the latter pointed a gun at him.
"Wh... What? Why?..."—Yukio said anxiously.
"Don't you understand? You only bring trouble. Choose: either drop dead or get lost,"—Scaramouche said cold-bloodedly.