I'm not surprised by what you found on her phone. This is why I've been advising you to focus on yourself and not worry about what she's doing.
No one says you can't choose yourself and your wife. Both of those choices require you to do the things we've been posting about. So regardless of what you decide to do for yourself, my advice is the same.
Detach from wife (lose control). Improve yourself (gym, diet, self-esteem, hobbies, relationships, etc). GAL (keep busy and focused on you).