Relationship mending.......?

So basically, we feel as if our realtionship is failing, but neither of us know what to do to mend it.. :( My girlfriend and I are in our mid twenties, and weve been together as a couple for nearly two years, and friends for longer then that. We were so happy together, and we both were looking for someone supportive, someone there, we both wanted the same thing in a person, a relationship, in goals and life. We've definitely been through extremely tough personal times together(we were expecting a child) but unfortunately God had other plans.. :( we have gotten the opportunity to grow as individuals and as a couple together. Her family considers me part of their family and her as a part of mine. This relationship is the most amazing thing that has happened to me. With her in my life, I am at my highest point! She makes me feel amazing! Nothing I have ever experienced before. We are a very mature, extremely dedicated and in a life long relationship. We've planned to get married, start our family, and lovingly grow old together. We've been trying to prepare for our future with schooling and hard work and dedication. But for about the last half year, she started a new job working long crazy hours and on top of that going to school. I have been working and going to school also, trying to find even more work to save, so I can provide her with a shelter of our own. Times have gotten extremely tough, and we dont get much time together anymore because of our schedules, and it does get depressing.. :( we cant afford to move in together quite yet because of my income situation.. :( We've been talking about this, and we want pion back into our relationship, she wants to feel more pionate towards me, but its hard to even know where to start to mend this when we get maybe one day a week together. We are both extremely lost and want to do everything we can together. I'm taking it hard because I wanted to propose to her, and I dont have much money to do so.. I have roughly around 1,000 to my name,, Its hard, saddening for me to even think about being apart from her because Iknow that this is the girl I was meant to marry and spend life with. I didnt get any sleep last night, just couldnt keep my mind away and the tears kept flowing. I feel hurt and depressed but dont know what to do to help our relationship.. please help, If I ever needed a friend, I need one now more than ever.. :(