basically, other than infidelity or some kind of physical abuse, gut it out. I had a rocky patch a year or so ago and talked to a friend who was recently divorced, talked for a long time on multiple occasions and that was the nutshell. I'm glad I've stuck it out, we’re only 7 years deep, 2 kids, one furlough, second airline pilot job. Aint peaches and cream, but the good times do outnumber the bad now.
Doesn't really answer your question, but unless it's screwing around or physical, stick it out.