Long Distance Relationships.

I’m only 15 and have been officially dating this guy for 5 months. There have been problems that we worked out with out much real problem. An argument never lasts more than a few hours before we cant stand being mad at each other anymore. I would say him and I have a good strong relationship and we (as stupid as this sounds from a couple 15 year olds) are in love. Sometime within the next couple years I might be going to Germany for a semester for schooling. What I am asking is, how do you think this may affect our relationship? We would most likely still have voice conversations online (skype or msn).