I know it will be hard. My sister lives in IN and her husband just got a job based out of MI. It is hard with two children but they make it work. I do not know if I could do it but she is such a strong woman, he comes home every 3 or 4 weeks for a few days, She said they actually spend better quality time together when he does come home and they talk on the phone a lot!
Just try to keep your life ultra simple and as peaceful as you can. When I was in grad school, I lived in another state from my husband, and we only saw each other every couple of months. In some ways that made life a lot simpler. I never watched much TV (kept it in a closet), read a lot, ate lightly (you don't cook as big of meals when alone) and did my studies. I had one dog for company, my husband (at home) was the one keeping up the whole extended-family, social, household, pets thing. For me, it was peaceful. We did burn up the phone lines and email connection. :)