Do I have any chance here?

Hello, this is so funny and desperate, lol :-D
There's a guy in my school, we've been friends for three years. I like him obviously. But I am sexually attracted to him. And I don't understand why he doesn't like me that way too. I mean, of course some people are just not attractive to someone else. But...for the three years, I've tried everything [from physical to mental changes(I'm gonna talk about physical changes more because my personality is probably ok when we are good friends right)]
After every change that didn't work I was trying something new, I dont get why he NEVER felt attracted to me like at all. Im not narcissist, no no no. I believe in myself, because I TRY SO HARD every day. For the first year, I wasn't really attractive (kinda chubby). But the last year, I eat super healthy, I do cardio, strenght training with heavy weights. I tried different hair. Now I have long blonde hair, tiny waist, toned butt with 1 year tryhard of healthy lifestyle, . I do jiu jitsu, have good results at school. We are good friends, we go to festivals together, cinema and stuff. I never talk to him about other girls or about or his look. Im just not nervous when we're together, I'm always trying to be confident and super cool :-D . I have also many badass stories he laughed and loved. We have some same hobbies. I think it's obviously I like him by the way I look at him and how supportive I am and how Im trying to spend time with him, but he also knows that many boys like me (even one girl, lol). We see each other at school so sometimes he can see some boys trying to flirt with me or something, but he really doesn't care. He never told me any compliment or flirty thing when we were together and the most flirty thing he texted me was "thx bb" (meaning "thanks babe") Once, it was a week ago :-D. I've tried everything during the three years. I tried to wear a sexy make up, I also tried to not wear any make up at all ( I dont have acne). I was skinny, then athletic and now I have even bigger butt and I can see muscles on my arms (just decent). I had shorter hair. I had longer hair.I tried to stop talking to him that much and stop caring, I thought he's gonna miss me. I also tried to care about him a lot. I tried to be talkative and then also more quiet. He liked a girl a year ago. I was like whatever it's been more than a year I try and he doesn't like me so im gonna pretend I support him and gave him advices about that girl and maybe once he will realize how worth it I am. Haha it never happened, he stopped like the girl because she didn't really want to communicate. He's 18 and he never had a girlfriend but I know he wants one, he told me. I think the way he doesn't want me makes him so attractive to me :-D. Now I really know I want him, I love his sanse of humor ,his personality and everything. We even were in class together for half a year. We were even born the same day :-D . I found a new part time job so I was like dont you wanna try it with me and he was like yea and we even work together now. I understand that when boys tryhard too much, girls dont like them because they dont feel excited about them. But guys, he never had a girlfriend and I know he wants one ..how can he feels nothing to me at all? I mean in sexual way..Boys are more sexually oriented than girls. I try soo hard to be his type, to be attractive, cool, good at school, interesting, nice, Im never angry, I never offended him...I think he just doesn't like my eyecolor or I don't know anymore.. please give me some advice. (Sorry for my english if you see any mistakes).....And yes I told him I kinda like him a year ago (before he met the girl he liked). I dont even remember his response It was just something like "yea i know" kind of style