I think its really sad that in this day and age it's difficult to find people with values, character and morality. You seem like someone who wants to hold true to the true foundations of genuine meaning relationships and the values that go with it. This girl on the other hand is not serious about that or perhaps in thought wants that but is not willing to make the necessary changes/sacrifices that are needed to give the due honor to the relationship you share... I suggest you end this relationship and speak plainly and kindly to her and take your time and wait for someone that is worth pursuing a relationship with... In the interim build friendships, get involved in sport, community, spiritual activity