Will my job adversely affect my relationship?

It should be fine,many relationships and marriages survive when one of them is away for months on end, Many relationships are where the couple only get together at weekends even if they live in the same area .You can be home most weekends and there are phones and the internet so you can keep in touch during the week .It is your job and jobs are important and not easy to come by ,it isn't as if you are off with friends and ignoring your girlfriend.