If your still in Grade school you should worry about work more than worry about boyfriends. The closest thing to a boyfriend I have is Therstion. Usually they just breakup with you and then you get depressed. So, me like my friends stay out of relationships.
If he isn't sure, I wouldn't go for him. Usually that means the he thinks he's too good for you, and guys that think that, aren't NEARLY good enough. I know that the thought of being rejected is scary, and well, they are called "Crushes" for a reason. But, if you really like him, like REEEEAAAALLLY Insanely like him, I would keep trying. Let me know if you need more help. --TB