What is there i can do..?

My boyfriend has pulled away from me, he has become distant with me due to work stress and problems. He works full-time and during his free time during evenings, he looks for a new job. He has had few interviews, some near my city but he has not been accepted anywhere yet. He is still waiting for some answers. He is unhappy with his current job and hates it. He told me on Saturday he is not feeling well about it. I am worrying about this and I am sad worrying that he is loosing interest in our relationship as he has not been attentive and I don't hear from him much? What can I do?