At 17, you're just starting out. Unless she's a supermodel and/or millionaires, let her go - there's a place in your life for crazy women, but a relationship isn't one of them. There's plenty of normal women out there, spend this time at college, with your mates, seeing which women come along, and look properly in your mid-twenties. You've the rest of your life to be sensible and settle down, enjoy your youth while you've got it, and certainly don't give it up for some deranged "girlfriend" whose clearly a sandwich short of a picnic.....