it's called Jailbait for a reason, be friends with her but hold off on anything more (even online) emotional until she graduates, kwim?

I've found, in my work, that a lot of people who can't release an old relationship are focusing on releasing the person rather than the resentment that came out of it. My first BF (and only EX) tried to run me down with his car during the breakup, it took me years to recover from his abuse and longer to just let go because I resented the hell out of him and what his actions did to my life. Once I let go of the resentment things got much clearer