I've been doing bad at school because i've been focusing on my drawing?

I've had a horrible day, completly crushed. I didn't know I was doing this bad at school. I try so hard but I'm just not good at school! I try to study, and I try to understand but I don't know as much as I think. I feel like an idiot I don't get the material at school. Im very shy and reserved so I don't have alot of friends, and I spend all my free time drawing because it's what I love. my vice principle had to talk to me cause my grades are low, and said I focus too much on my drawings! He even takes me out of my art elective and puts me in study hall! I don't get why good grades should matter if you have a true talent and passion about something. Besides art I love to write and have considered becoming an author in my future many times, I'm honestly still not sure what I want to do with my life. Im in 8th grade, I was suicidal in 6th grade and those are coming back again. I'm a new born christian, I shouldn't think this way but all day today I feel like dying. On top of that there's a guy I like who's incredible. He's a strong christian, funny, sweet, not a perv, he's just as mature as he is immature. I actually started liking him around the time I was suicidal because he was so strong in faith. But he's incredibly smart and Im not smart enough for him, I can't even talk to him! I don't know what to. I sit in a corner everyday and other students even teachers pass by they don't even notice me. I feel like a ghost, like no one could see me. I'm just invisible to the world. I know everything about everyone else, i've swam in everyone else's ocean, but no one's swam in mine. I feel like I want to die. I can't get myself to pay attention because im always drawing