it could be a mixture of things...i honestly feel like that towards my S/O however I'm with our son 24/7 he rides to daycare and back with me i work in the same building as my son goes to daycare and for me i just want to be alone even if it's for 5 minutes... but it never happens.. but if he's "unhappy" then yall truly need to talk it out before it becomes a bigger problem. he could be cheating he could be just needing space or he could just be needing to do something different than the same routine... and sometimes that's me..