I'm a freshman girl and he's a senior guy (read details please)?

Dump him, I don't care how hott he is, it is your best interest to dump him tomorrow at school before he even talks to you. The first words to him should be "I think we should see other people, I just... don't like you anymore" I'm sorry, I know you think I'm stupid and I don't know anything, but I'm the same age as you, only I'm a boy and all I can say is that I am truly disappointed in you. Your question makes me wanna' cry, this is not ethical, it may even be illegal. I don't know but, just... break it off. It's your best hope and frankly... your only hope at this point. I'm sorry :(