Help us make it work :-)

So my boyfriend and I celebrated our two year anniversary earlier this month. He's my best friend and pretty much the only person I talk to outside of my coworkers at work and my family. There hasn't been a day where we don't at least talk on the phone. I love him and look forward to really settling down with him.

My beloved started a new full time job a couple of months ago. He's not very proud of it but grateful he has work. He may not be where he would like but he's trying, at least I think he is. I try not to bug him too much because he's stressed about it.

The real issue is our schedules are the complete opposite. I've been training in my law enforcement job and my schedule changes every four weeks. Right now we only get to spend about 4 broken up hours a week and spend the rest of our time together on the phone. He works graveyard and I work mid-day. My job is incredibly stressful and quite depressing at times. I know it sounds selfish but it's hard to be 100% there for my boyfriend who is going through a tough time when my job requires me to be at full alert for 10 hours a day.

So, I finally arrive at my point of the post and the reason I have come here for assistance...

I feel like our relationship has really hit a low due to us not being able to see each other as often as we once had and would like. My boyfriend is naturally a closed off person with me, especially when he's stressed. I'm usually the one who's open but when I get home from work I need time to unwind and not talk and get rid of the sound of the constant chatter in my brain.

Are there any ways for me to be the supportive girlfriend I should be and bring the spark back into our relationship so it doesn't burn out? I'm worried it's going to crash and burn if I don't do anything to help make things better.

I should probably note that I'm 25 and he's 24. I should also probably mention that I'm starting to get the itch to move our relationship to the next level as well but it's difficult to have a sit down and discuss our future when we're both just mentally and physically exhausted.

Kind posters and trolls, I appreciate your advice.