They probably won't. Not because they don't care — because it's unsaid.
What's one need you have that your partner hasn't been meeting?
Not a complaint — a need. What are you quietly hoping for?
Most relationship resentment builds not from cruelty but from unspoken needs. Research on couples communication consistently shows that assuming a partner will "just know" is one of the most reliable paths to disconnection. Naming a need — first to yourself, then out loud — is the beginning of getting it met.