When the other cheats, will it ever be able to be fixed?

Taylor
When the love of your life is caught with multiple dating site memberships and accounts for porn sites, and nudes from exes and random girls all while have being in the relationship the entire time, what's next? Their excuse is they didn't physically cheat but it still makes you feel unwanted, unappreciated, unloved. And when expressed how you feel, and you catch it again, how do you fix it?