Am I really being too needy?

I have been married for over 15 years now, and have followed my husband wherever he has needed to go for his career. My husband works very hard. He is gone 5 days/nights out of the week most weeks. When my husband is home, he is still working hard, along with trying to get his 'to-do' list done in the short amount of time that he is home. I am a stay-at-home mom. I am home everyday taking care of our kids. I appreciate the fact that he works so hard to provide for us (I even feel guilty that I am not contributing to our income), but when he is home, it is like he isn't even there. He answers his e-mails at the dinner table, will talk to his coworkers anytime they need him, and will even check his e-mail at midnight if his phone chimes that one came in. He says that if doesn't answer it right then and there, that there it will just be more work for him tomorrow. Within the last couple of months, his work schedule has become worse and he is gone even more. I recently broke down emotionally and told him how I felt like I was being ignored (and our kids were as well). He told me that he was not going to feel guilty for doing his job, and that I am just being needy. Am I really being needy or am I justified in feeling this way?