Come on razor man. You talked to her and to be realistic u talked rubbish.
You should have had a precise sentence to say at time. It would never be the case that she would stop and give u 5 minutes to convey watever u want to say.
Its make or break u have already ruined a perfectly good chance already.
Next time u have the guts to say something than say something good. May be u can ask for a teacher or help her with some studies or may be notes. but it should be a solid start not a rubbish like "something personal".
She must and should have dumped u right there and than on that "5 minutes something personal note" come on.
on a personal note if u are really in love than u must calculate ur odds. ur family, her family and their compatibility and her way of living whether u will be able to manage with her or not. Dont set ur expectations high and neither you should give her any wrong notions that u have got money or etc. coz ur just a student and will be looking for a job soon and have got much to prove to u and ur family at tis point of time. Assuming good things in future at this point of time must be well evaluated first.
Anyways if u have her u will still end up in the same state/scenario. Anyways best of luck.