Pls help!

Okay so this manhwa or a manhua(I forgot, but it's basically colored), the mc is an acto(?). And he has an unrequited love to another guy(let's call him B), WHO also had a crush on someone else(let's call him C). if I remember correctly, C is just playing hard to get with B, and the Mc is literally like a doormat to B. I'm talking about like around 70 chapters of chasing after B, whom doesn't even like him. Anyways, I remember this one scene where the mc basically told B that if he leaves, the mc is done with him. And B got all offended like "do you think I'd do that for you? Who do you think you are?" And mc the doormat legit kneeled and begged for B to not leave. And then FINALLY, the mc eventually started moving on and basically erased B's existence from his mind. That's the only thing I remember.