Well it sounds like you know the truth. He doesn’t like you. Trust me I’ve had a situation where I was that guy, and I’m really sorry to say, there’s little you can do to change his mind. You can ask for his forgiveness if you still want to be friends, but it sounds like what you want is him to like you. So what I suggest is to try and work on yourself. Not saying you need fixing!!! I’m sure you’re an amazing person. I think you should try to work out or something like that. Try a new hobby. Something that will make you more attractive for the next guy that hopefully sees your worth and wants to be with you. I’m really sorry. I hope I helped you, but I’m still young too so I’m not an expert.