Long distance relationships at uni, is it really worth it?

Me and this girl were seeing each other for about 7 months (long distance), and had always talked about being in a relationship towards the end of seeing each other, yet I just held back from taking it any further because of uni and not knowing what I wanted. We're in a long distance relationship now and have been for about 3 months so it's still pretty fresh, we're going to uni's at different ends of the country with about a 6 hour train journey to each other. Lately we've been winding up more frequently now than ever when we lack communication. I've been through a lot with this girl, I currently see her quite regularly and she thinks of me as "the one", yet I don't really believe in that at this age. I just feel like neither of us will have the time or money to see each other, and is there really any point in that? I do love her, but won't push myself the whole way because I don't know what's going to happen at uni, probably down to my past being messed around before. Any help?

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