I have the same problem here, and I'm about your age. I used to not eat breakfast in the morning when I'd be heading out to school, because I take most of my time at 6 am to shower. I find little time left for the cereal, but last year in seventh grade I made a conscious effort to have cereal in the morning. After to visiting my relatives in Poland for the summer, I've been making my own breakfast. They believe American cereal is basically sugar flakes and hardly sustain people... When school starts soon, I'll be getting up earlier to make breakfast for my sister and I AND taking a shower (I feel fresher showering in the morning).
My mom makes school lunch for me. She usually packs a sandwich with tomatoes, lettuce, kielbasa, cheese (yuck), and a water. The school cafeteria is DISGUSTING except for the wrap section I get pretty bored with the sandwiches if it goes on for some months, and begin to eat only half. I'm not quite sure how to solve that problem ^^"
All my friends tell me I look like a stick. My arms, legs, and wrists are very thin and I'm aware about it. I eat anything I want from the kitchen and nothing changes. I guess it's just my frame. I'm just like my gaunt dad, while my sister resembles our mom. I know to never stray into eating disorders, because it could end terribly. So, that's just about most of my problems ^-^