Why did he stop talking to me???

This one guy at my job started to check me out constantly. And I normally always dress up. At my job they said we can dress up in a cosplay or costume. So I had decided to cosplay as a maid. (yes safe work modest maid. It was a little short but not too short...Anyways he started to act really nervous around me and distance. And I'm a empath too. I can tell he was kinda uncomfortable of me wearing that. Not gonna lie I was sad but brushed it off. Because I really enjoy his company. And we both really like anime. I love anime! Anime is life! Anyways... I don't understand of why he would get that way around me. He normally likes to stick around conversations with me. But this time he was distance. He was close to everyone else today but me. Was it possible he didn't like the way I had dressed or does he like me and too scared? Or was he turned on but tried to hide it. I didn't see any obvious signs of him being turned on. And yes I'm one of those people who does gets sad whenever someone I thought was cool or vibed. Stops talking to me.... I just wanna get y'all input and opinion on this matter. Also it was modest length so not too short and not too long and it was a cute sort of French maid outfit. It wasn't a lingerie looking maid. It wasn't revealing or no sexual vibes to it. I'm really curvy so of course most will try to sexualize me sadly. It is those maid outfits you will see a lot in Japan and in animes. It's more of anime Japanese cutsy innocent maid outfit. They label as French Lolita (not the inappropriate Lolita. Please Google Lolita fashion) It came above my knee.... It wasn't even thigh length. (Which either length wouldn't be bad at all. But my length was totally appropriate for work.