I really like a boy at school too, but I don't know if he likes me back. I just can't get him off my mind! So, I have at least a little understanding of what you are felling. Here are some things that I think you should try doing in this situation:If you really like this girl, I would be careful and take things slow. But, I wouldn't be too careful to the point where it is changing who you are as a person. First, you should try to start conversations with her at school. Get to know her as a friend first so that she is comfortable with you and doesn't get overwhelmed or scared. When you talk to her, make sure that you talk to her in a way that she knows that you care about her. Also, if she talks to you, listen and pay attention. I am a girl and I always find that guys who want to get to know me and treat me like I am special in their eyes catch my attention. I also get filled with butterflies when I smile at my crush and he smiles back. Actually, one of the best ways to make a girl like you, is to make her laugh or smile. For example, often my crush will pass me in the hallway and say, "It says gullible on the ceiling!" and point up. I find it adorable and even comforting. Another way to grow closer with the girl you like is to (if you have any classes together) work with her on a project. My crush asked me to work with him once and I think that it really helped us grow closer as friends. When we finished our assignment and got a 100% on the project, he was thrilled. He said that we work well together and by the sounds of his voice, he would probably want to work with me again! Once you get to know this girl well as a friend, I would try to get to know her more personally and be more than just a person to laugh with. Talk to her about some of her personal struggles. By telling you this, she won't expect you to fix her problems, it is just a way for her to have some kind of support. Make sure to ask her, "How are you?". To be honest, most people answer this with, "I'm good." or, "I'm fine.", but don't let her slip away so easily. Show her you care. Look her in the eyes and tell her, "No. How are you really?". My crush did this once and it really touched my heart. Even though I was going through a rough time, he showed that even if no one else in the world loved me, he would always care about me. Make sure to tell her how you feel too. This way she will know that you want her to know more about you and that you want to know more about her. Even though this all seems scary and overwhelming, girls like confidence. Don't be shy to be who you are in front of anyone. Show her that you are who you are and aren't afraid of what anyone else thinks, even if you really are. Be confident in who you are, never be ashamed. If anyone is teasing her or being mean to her, stick up for her. Show her that you are there for her. Unfortunately, this could all backfire and she could end up seeing you as a brother or just a friend. This may also end up making you think about her even more than you already do. But I would say, if you like her, go for it. Whatever happens, approach this with a positive attitude and it will all work out in the end.