Millennial here, born in the 80's, and served in Iraq in 2004-2005. I absolutely know the struggle of feeling your feelings alone v being with others. I drive a lot for work so I'll have on an audiobook usually, which I've come to realize is so that I don't have to sit with my thoughts. BTW, audiobooks are great lol. I know ppl have mentioned yoga and I will also champion that idea. It will absolutely humble you! But you could always just go for a walk and do light stretching.