How do I make my relationship survive?

I've been in a relationship for close to a year and half. This girl is my best friend and my complete match. We've literally never gone one day without seeing each other since the day we met. We don't live together but she has a drawer at my house and I have one at hers. She just left her job for a better paying one and now spends 10 hours a day at work and I only get to see her for an hour a day. When she gets to my house at 11pm she's groggy and tired from work. She either falls asleep or is so tired that we don't get to spend time together and goes home for the night. When she wakes up in the morning it's almost time for her to go back to work so I don't see her again until 11pm the next night. I feel lonely all the time and a bit empty. Now I've become cold and slightly indifferent towards her but I know how much this relationship means to me. How do I deal with her work schedule and manage to keep this relationship healthy without compromising my happiness?