I think the best approach is just to wait until you graduate (it's just a couple of months, in your case!), keep contact, and maybe start a relationship from there,...

If you really are in love with that person, it won't be any trouble at all to keep contact after graduation. You still have a few months to think about it.

I definitely would not start a relationship just before graduation, it's the worse possible time. Just use this time to build regular contact that you will continue after graduation.