To hop on that....It can be tough.
My wife is cat-like, she loves her free time and I think she largely tolerates me around the house for the most part.
Maybe your partner doesn't feel included in your work life? Maybe call a little more often and "data dump" a little bit so they know you're not just shuttling around the world in first class, doing no work and someone throws money at you for nothing.
Plus, it may be helpful (somewhat) if you got your partner connected to another person who is with another pilot to bounce ideas off of or a little guidance. They're familiar with Kristie and I'm sure she'd take the call or text anytime. ILL MAKE HER!!
Is there any chance your partner can meet you for your layover? Might be a fun change for both of you, especially if your route is the same for a few days, if you're doing out and backs. All you have to do is contact the hotel to see if your partner can stay in the room or book another room between stays (paying the price needs to be paid, depending on room cost). Doing small fun changes can make a long month feel short, even if you only have 11 hrs to see/walk/experience something different and have a meal together in layover location.
I sometimes do that when Derg's got a long month of work, depending on my schedule.
I'll fly ahead early, do my own thing for a day or two, then meet up with him (save some hotel cash) and if able (depending on flight loads), ride back with him, OR
If he's doing 2 back to back 3 or 4 day trips, I'll fly over with him, stay with him for his first layover, have my own hotel room avail for the in between timing and then meet up with him again for his 2nd layover and try to fly back with him.
To be honest, your career revolves around both of your lives and some data dump (not all negative of course!) isn't a bad thing. It helps your partner *feel* included and connected to that segment of your life.
We (spouses/partners etc) tend to speak out/up when we start feeling "left out".