Because you've been through a lot - a lot more than most men have to deal with in their lifetime, and you hardly had any time to recover from it. Then you made a big decision that changes your life. It might have been something you chose for yourself... but it's always difficult to leave behind the life you've known and choose something different. [He knows a thing or two about that, even if the situations are different]
[Pets his fingers through his hair gently, touch light] Even more so when you're leaving behind people you love. Anyone would need - and deserve - comfort for that.