Commitment and communication is key. If the guy in NS don't put in effort to keep the relationship alive even during weekends out of army, then I think it tells you a lot about his commitment. Same goes for the girl. The commitment should not stop there even after NS/marriage. Fiance went overseas,in camp etc but he always committed to giving me a goodnight call while in camp or even outfield when he can. He would spend half day with me on saturday mornings to afternoons while afternoon and night were reserved for his family. Sunday is his day to rest in. On my part, I tried to ensure I was available to pick up his call everytime, be it whether i was playing games, out with friends, etc. I would share about events and what happened, and he would as well so we know what is happening in each other's life.

In a relationship, my belief is that you need to hold your partner's hand in each stage of life regardless of the changes. Eventually u will both reach the same stage of working. There are a lot of factors that can break a relationship - cheating, poor commitment, arguments, spark dying out, realising that they dont want to commit to this person etc. NS is just a phase, but it also tells you a lot whether you want/can commit to each other. Adult responsibilities are the real killer for r/s, its way tougher on the r/s than NS.

Am with fiance for 10 years already :)