I'm not sure what to do

So this guy that I've been hanging out with and talking to from school really wants to be more than friends. We act like we're kinda bf/gf but it's not official. He has spent some time with my parents and they think he's fine but they still don't want me to date. In the beginning of us talking I really wanted to date him, now I feel like I just want to be friends and focus on school. I just turned 17 and I'm graduating in a couple weeks. Whenever I have too much work he gets angry and complains. I will be much busier with school in the future to come. He's also very protective and gets angry even if I'm talking to my guy friends which he also hangs out with sometimes. He also talks about getting married and having kids and that's no where close to my future plans. I feel like running away from him when he tells me those things. The plans we have for our future are so different. I've never had a bf before and he's been in a semi serious relationship before. I get really ucomfotable when he says that he wants to spend time alone with me or go to my house and hangout. I just want to say no and walk away. I just feel kinda trapped and I want to be free and go places and not worry about him getting upset all the damn time about everything. Overall he's good towards me but he's also kinda controlling and is so sensitive. All my friends are tired of him getting upset over everything. He also tells me that if I leave him, life would have no meaning and he'll kill himself. I don't know what to do 😞