help? :(

I am a freshman in high school me and this guy liked each other and he asked me out i said yes but I’ve realized im not ready for a relationship. please keep in mind we’ve only been dating for two days and he wants to hang out but i don’t think i want to. im not ready to be in that type of commitment i feel I’m too young and its better to end it now instead of when someone can get really hurt. i do like him though and i want to remain friends but not be in a relationship. What should I do? Do I break up with him? If so how? please help all thoughts are welcomed