42. When you come home from work and instead of getting out the car right away you want to stay in your car longer.
43. When it starts to feel like a bottomless pit. No matter how much effort you put into it, things don’t improve and you get less and less back every day.
Alternatively, when you realize that you can’t problem-solve for shit when the two of you are together, even simple tasks that require nothing more than open communication. Relationships require work, but they also need to be functional. If basic incompatibility keeps the two of you from working together as a partnership, it’s fucking doomed.