<human>: Bit of history first, nearly a year ago we hit a crisis point in our relationship.  We both had our issues, mine depression and hers an inability to communicate without shouting and shutting me down.  The problem is that shortly before the crisis point I believe that my wife gained a new online friend which she was not open about.  For the first time since I've known her (we've been together almost ten years) she started to hide her phone from me and there were multiple other times where she acted out of character.  At the time I feared the worst and that sent me into an anxiety spiral that left me unable to eat or sleep for weeks, I was a mess.

I needed help and sought counselling, thanks to that I was able to confront her on these issues, but each time she denied everything and I felt like things were still unresolved.  I asked her to work with me to prove one way or another so that we can move on but each time ended in arguments.

Since then we both completed individual counselling courses and things have improved a thousand times.  We're both committed to the relationship, we communicate better (but not as well as I think we should, but way better than before) and our lives should be getting back on track.  However all the time I've been thinking about this person.  I don't believe that there's a physical relationship, but I cannot understand why it stays secret.  I know she loves me, I know she's in it for the long term so it bakes my noodle why she would want to hurt me so much.

I so desperately want to believe her and feel like a terrible person doubting her like this.  Some days I wonder whether I'm just making it all up in order to find a magic "fix" so that she can admit it, explain why she did it and then we can both move on.  I keep trying to ignore my suspicions and move on myself, sometimes I managed a few weeks, sometimes a month but it doesn't seem to help.  Each time I confront her I'm unable to really get across my point and end up hurting us both.

Summarize the given text in a few sentences.
<bot>: I believe that my wife is hiding an online relationship.  She refuses to prove one way or the other and I'm going nuts over it.