I guess I can say "ditto" to most here.
I am not sure who talked about the "mid winter blues". I think "I" am also feeling that. But I call it the "rut". When work and routine take hold. Me and my partner are doing less "riding" and "goofing" off on weekends. We are working --and not in love w/ our jobs -- and not doing much else. So what is there to talk about? It is just work, come home, work out, fix dinner, watch TV, sleep and repeat. I know a weekend ago when we got out of town for a charity run, we had the best time. We did nothing special...but we did not "snap" at each other the entire time. That even includes driving, getting lost AND getting up at "before the crack of dawn" to be at the race way earlier that I wanted to get there. Since we got back home, kinda back in the rut. But I see light at the end of the tunnel. It is really hard when you get to the 10+ year mark. Talk about "routine" setting in.
So "ditto" this is normal.
But "ditto" don't let too much of this worry you.
BUT "ditto" don't ignore it. I am using it as my "wake up call" to be sure the routine or rut does not turn into a big divide that can't be fixed.
I need to re-read all these posts to make sure I use the useful advise myself.
Good luck!