What the hell am i doing????????????????

What the Hell am i doing?????? He broke my heart and he wants me back. He tells me he loves me and that im his dream girl. But he's in Grade 12 but im in grade 9. we only dated for 24 hours. He told me OVER text that he wasn't ready after he led me on. now months later he wants me back. My friends hate him. He hit on some of my friends before we met officially. He has seen me before we met and after that he hit on my friends and they rejected him. should i reject him?????? they say i should. but i like hearing how he loves me. he screw up so badly. he even said he could see us get married. im scared. im only in grade 9!!!!!!!! i shouldnt be thinking of that yet!!!!!! SOMEBODY HELP ME!!!!!!!!!! I DONT KNOW WHAT TO DO!!!!!!!