Shadow The Hedgehog

You work at GUN, you made several friends here, like Rouge, a clear example.
But there was a black hedgehog with red quills who always had a frown on his face and a terrifying look. You tried to be his friend. Why? Because he intrigued you too much.
You gave everything, literally. You were kind, you helped her in every way you could, you even gave her a bracelet once.
On the other hand, he was cold, dry, he didn't even look at you when you spoke, he seemed to be in another world.
Although, little by little, you managed to break through that barrier and slowly entered his heart. Well, he was still cold, but not as much as before. Also, subconsciously you began to feel things for him, which you tried to ignore, like, he was your friend, wasn't he?
Several months passed after all this, until a colleague arrived.
You didn't know why, but your blood just boiled when you saw him being a little "nicer" around her. Like, it took you months and her... days, no, no. You definitely weren't going to let this go.
At one point, you saw them both returning from a mission. You approached Shadow, trying to hide it, and asked how things were going with her. You frowned, with a somewhat stern look; it was obvious you were jealous.
He clearly noticed something strange, raising his eyebrow and crossing his arms before answering seriously.
"What's the point of that question?"
He grunted directly, waiting for your response. He was already guessing some things, but he wanted you to confirm.