I had known my husband for only 6 months before we got married (to the day). While we were dating, he came to a few rehearsals (I was still in college), saw my show and helped (and got injured) at strike. He was really into it, and encouraged me to apply for a SM internship across the country. When I got it, he also got a job in the area, so we got married and moved to California.
In the last 9 years since we moved, it's been difficult at times. After my season internship, I got a job at a ballet company, which was to our advantage. His job is Mon-Fri business hours, and so is mine, (when we're not in tech or performances). That meant only a week here or there when I would be gone all day for 6 days in a row. My husband also travels for work at least once or twice a month, and sometimes he's gone for 2 days up to 2 weeks, so that worked out OK for us. What was hard was Nutcrakcer - so like you did - I made him audition to be a Supernumerary so that we got to spend time in Saturday rehearsals together, as well as during a majority of the performances. But after 5 years of being a Super, my husband quit (it was taking up a lot of time).
Aside from Nutcracker, it got difficult during our summers, as I would go back to "regular" theater, working 6 days a week, long hours for 9 weeks at a time. His work would usually make him travel on Mondays, so my only day to see him would be cut off. Needless to say, my week off between shows became extremely important for us to get to know each other again. Sometimes those 9 weeks - we just felt like roommates who shared a bed.
The absolute worst was when he went back to school to get his Masters. While I had banker's hours during the regular season, he was in school and working 20 hours a week, so he was completely unavailable, even if he was in his home office. Then, when school broke for the summer, I was back at my regular theater gig, and by the time he was ready to go back to school, I was just finishing up. This cycle lasted about 2 years and was the most trying time of our marriage. It does mean that you have to find time somehow for each other to talk, catch up, and learn to not fall distant. Sometimes my husband had to find a way to not work on school for just a day, so that we could spend it together. And you have to find a way to get mentally away from your show and devote your energies to your husband in return.
I'll say, I'm not looking forward to my husband going back for his PhD this fall, and he will be taking classes in the summers, so regardless where I'm working, he won't be available - but we will force ourselves to find time for each other. You can't let a marriage go sour because you're just too tired from work to make your marriage work. As far as I can tell, we have been through rough scheduling times, and we've made out OK. I can't imagine what it would be like to throw a child into the mix, but we'll cross that bridge at some point.
Most important: find the time - make the time (but don't schedule it, that feels like your brain on work mode), talk with each other, spend quality time together at home or someplace peaceful, don't belabour your precious moments by unloading all of your work gripes on your spouse - and remember to kiss each other at least once a day. My husband always kisses me before he leaves for work, even if I'm still asleep, and I do the same for him on weekends.