Wow. I cannot believe the vitriol this morning. Is the heat getting to you all? I am not 'in the theatre', just an avid theatergoer, but I have a job that puts me on the road about 175 nights a year. My partner is an architect and he travels a fair amount too. Here are some suggestions:
-Talk on the phone EVERY NIGHT. Don't rely on email. You need to hear each other's voices. It doesn't have to be a long call. Buy a phone card if you have to and, if your schedules are hectic, make an appointment to talk at a particular time.
-Send him a card. If he's touring, figure out the next stop and have a card waiting for him at the theatre. It'll make his day. If you can afford it, send a dozen roses once in awhile.
-Resist the urge to do the jealous thing. Don't accuse him of sleeping with every girl (or boy) in the chorus, or going out to bars on the prowl. That won't make him miss you and it may just have the opposite effect. If he's mature, he'll stay true to you.
-Make plans to get together. Don't just assume it will happen. Check out his schedule and arrange to fly out to meet him on his day off (and stay to see the show one night, too). I know plane tickets are expensive but check the airlines for last minute e-fares or try priceline.com. Got a birthday coming up? Ask your parents for a plane ticket as a birthday present. Plan it together, don't just show up and surprise him (not that you might find him in bed with someone, it's just that he may have made plans with other cast members for their day off, or his Aunt Mildred may be in town that week) And, if he's sharing accommodations with other cast members, try to book a nice hotel room for just the two of you. Order room service and have breakfast in bed. Drizzle maple syrup on his chest and lick it off (be careful, he may be late for the matinee

)
-Don't assume he is having a wild and crazy time. Life on the road gets pretty dull. Unless you are in Miami, San Francisco, or LA, every town starts to look the same. He's sick of bad food in late-night diners, sick of lumpy hotel beds, sick of waking up not knowing which town he is in, and sick of not being with you. Listen to him and let him vent. Tell him how much you miss him but try not to burst into tears. Tell him you understand he's doing this for his career and that you support him. Tell him you can't wait to be together again. And, at the end of every conversation, letter, and card, tell him you love him more than anything in the world.
Good luck.
Paul
'Our whole family shouts. It comes from us livin' so close to the railroad tracks'