First of all I don't think he is your last shot. Even if it didn't work out there will be someone round the corner. I thought I would be single after my last ex and end up a crazy cat lady, then I met my now husband!

It does sound like his work hours and the driving etc is causing stress for you both. Are you able to suggest a weekend away somewhere? Where you can both relax, talk and just get away from work and life back home.