If I had the choice of a sexless marriage or a marriage with someone who couldn't fulfill me mentally & emotionally I'd take the sexless marriage every time!
As others have suggested: make some time for the two of you. A date night.
We did this tonight. We went to our favorite sushi bar as a Valentine's treat AND a 'happy place' visit since Breathes has been feeling down in the dumps lately.
There are as many ways to do polyamory as there are people practicing it!