I feel bad for her but she knew what we were getting into when I started training.
Knowing what one is getting into and actually experiencing it are two different things. Hopefully I can offer some ideas for you. And "send her packing" is not going to be one of them. I really hate today's "throwaway marriage" mentality (look at divorce rate) - what happened to "for better or for worse" and actually
making effort to
work on issues instead of saying "ok I'm done, she's being a *&%!$" and filing the paperwork. There are times when "sending people packing" IS appropriate (mental/verbal/physical abuse, cheating, addictions, etc etc) but when things are workable...try to work!
Anyway, like I said, knowing what you are getting into and that the other is going to be gone for stretches of time can SEEM ok "on paper", but you actually have to experience it to know how you are going to handle it or not handle it. Did she think to herself, great, I'll spend time with girlfriends, with family, my hobbies? And then when you were gone, think "this sucks" and be lonely?
In a relationship, for it to be balanced each individual has to give 50% in lots of different areas. And each individual has to be happy and complete in themselves for the relationship to succeed. Work, home, relationship, hobbies, family, friends, all that must have equal balance. A lot of people let "relationship" or "work" take over 50, 60% or way more of this 'building block' setup of things that make us whole. When that happens, we become unbalanced as individuals.
I know it's easy to get in a rut and feel lonely when our other half is gone. It's hard to do, but if she doesn't do so, she needs to spend that time having girls nights out, doing the things she loves - shopping, going out, any hobbies she has.
My other half doesn't travel a lot, but when he does, or when work keeps him out all evening or he's busy with his band, I take that time to go ride the horses, clean the barn, fly with my students, schedule a girl's night out, do shopping (or anything else he hates to do!)...or hang out at the house with a glass of wine watching things he hates to watch and doing girly stuff.
I used to fall in the lonely trap. Then I realized I'd moved away from the stuff that made me a complete
individual and put too much of my time into the relationship. Gotta keep things for yourself. That you enjoy. And then when YOU are home, you guys can do couple stuff and recharge. And you need to be willing to give her that couple time when you are home, make her feel loved and wanted and know that you think of her and miss her when you are on the road...
...but also, it's her chance to go be who she is as an individual and keep that important life balance.
Hope that helps.