He talks to everyone but me? Why?

This guy I work with straight up ignores me and avoids eye contact. I actually feel like this dude legit hates me but the thing is I did nothing to him. He will speak to everyone but me even if we re in a group of people. He will only speak to me if he thinks it s important, I guess, which usually doesn t require him speaking to me but the thing is i catch him staring all the time, he looks away when I look at him, he goes to fixing himself up when he notices I m around and when I do speak to him he s super sweet and respectful, smiley with his mouth and eyes, seems nervous. He has such a nervous energy but if he thinks I m not around or looking, he s really cool calm collected and flirtatious and playful with everyone but I don t get the ignoring me thing otherswise.

I m actually annoyed. I d rather him just say he hates so I can at least know but like I said to my knowledge, I ve done nothing for him to hate or dislike me. I could ask him but i think he could easily act as if I m crazy which I m kinda feeling like it.