I think I'm a demigod, but i don't know. Help?

I look like only one of my parents, i love the water, i can hold my breath under water for a really long time, like 20 minutes. I have dark black hair, and green eyes. i have tried archery and i was really good at it, i tried to shoot guns, and i was terrible. whenever i walk by a body of water, i feel the urge to step in it or jump in. i am a 12 year old boy. last year, my homeroom teacher attacked me and was arrested. i don't know what to think of all of this. do you think i might be a demigod? if so, who do you think my parent is?