<human>: Can you condense the text into a few key points?

My girlfriend is constantly talking about how she wants to be with me forever. I really have strong feelings for her but I'm not sure how confortable I would be with staying with someone forever when I'm only 17. I know this sounds immature and kiddish but I don't know what to do. She's saying that she wants to go to schools closer to home because of me, but I don't wanna be the reason that she could have a shitty time. I also don't want to be the "Boyfriend back home" (she's a year older). It's not like I want to breakup with her, I'm just not sure if I can promise forever. What do you guys think I should do or say?
<bot>: What do you say to a girl crazy in love with you when you're not totally sure you're gonna stay crazy in love with her?