Hahaha....aww Highschool. I remember those days. Anyway OP, here's what I WOULD DO, I approach K telling her my feelings for her and how much it hurts me to know she'll never like me. Like...you want to continue being friends but it really hurts just being with her... and thats it. Whatever happens next is her decision. Plus its good for you. It gets you to release all your emotions and hopefully THAT'll "turn your life around" AND enjoy the Senior life my friend!