My girlfriend is too busy for me

My girlfriend and I have been dating for two years now. She lives an hour away and so it is hard to find time to spend together as it is. She is heavily involved in activities (work, theater, etc..) that I can not join in because of my own schedule (I have to work.) She is so busy that she will not return my calls for days at a time and it drives me crazy! By the time she does call back I'm so mad about how long it took that I don't want to talk to her and we argue instead. She swears she loves me and I believe her, but not seeing her is hard enough. Not hearing from her is even harder. It is killing our relationship and we are both under tremendous emotional stress. We both love each other dearly but we are considering separating because of it. I try to be understanding and compassionate about it all, but my needs are not being met. I don't want to break up. How do I handle this? Are we doomed? We are so distant because we are going through school first to establish ourselves and afterwards we had planned on getting married. Is 3 more years of this worth a chance at a better relationship in the end with the woman I love? Any help would be appreciated.

When both partners in a love relation are very busy, they need to sit down with a calendar when they finally meet and make plans for the next meeting. Or you can decide that, for example, saturday or sunday is your day when you always meet. Then you do not have to call her, as you know when the next meeting will be. There is no reason to give up the relation, if this is the only problem. There are people who meet very seldom as they live in different countries, but still have a happy relation.