I think that you need to sit down with your DH and explain how you feel about him, about yourself and your desires and about your priorities.
I (M) have had many years where I struggled to understand my wife and what drives her. We had many tough years where we were juggling children, renovating a big house (which filled almost every minute I wasnt working), her stressful work and me running a business which required long working hours and regular international travel. Exhaustion and stress were our constant companions.
Whenever I was having to motivate myself to keep going through the daily pressures I would think about how gorgeous my wife is, how much I would like to be cuddled up with her, feeling her, touching her and having sex with her. As a result whenever we did get a moment together, my number 1 priority was to have sex with her and I assumed that her mind would be working the same way and she would be thinking the same.
When I got pushed away I got frustrated and I really didn't understand how she could be going through the same challenges as me and yet didn't seem to see sex as the special relaxation and escape from the daily grind, the way I did.
I admit I still don't understand what she thinks about to get her through the tough times, but I have come to accept she doesn't think the way I do.
My guess is your DH gets through the daily grind when he is travelling in the same way, and doesn't understand you are different. Explaining this clearly - not just that you don't think the same way but also how you do think - would help a lot in bringing your DH around.