Need help discovering new thoughts for a circumstance in a troubled marriage.

What are some questions I can ask myself to find new thoughts that resonate with me regarding this circumstance? I’m having a hard time finding a neutral thought for this situation.

C- Wife is on her phone
T- She’s talking to someone else
F- Unwanted
A- I ask her who she is speaking to
R- She says no one, gets mad at me for asking, I doubt her faithfulness.

We already have some trouble in our marriage and are separated.  I can’t find a good replacement thought for this circumstance that neutralizes and changes my feeling.