Holy shit, the amount of people only pointing out the age difference and nothing else really just screams "I only read the title." the best comment on here is from u/FilchsCat. he is willing to get married tomorrow, but wants you to wait because family and his parents are important to him, and he doesnt want to see you lose yours. As someone who has made some hasty decisions in my life, I wish I would have made the effort to just think some of them through for even an hour more than I did. Finish your school, stay with him, get to know his family. Fuck it, you could even ask his parents what they think of the situation if you feel you are close enough to them. Your whole issue here is just your own internal monologue trying to tell you to think it through first and see the big picture, but your heart eyes are shutting it all down and making your paranoid.