Teens wants dating

My wife and I currently relocated and spent a few months apart in the process. We weren't at the greatest place in our relationship prior to this but thought it would be good for our family (we have 2 -)for us to this new place home. Upon having us all under one roof again, my wife was distant. I tried giving her space until I noticed some text messages on her phone one morning. I was explained that this was just a running joke and it meant nothing. I don't know if I completely accepted that but tried to work with her to move past it for the sake of our family. A few weeks later I noticed she was still texting the same guy a fair amount, although the messages that at least werent deleted seemed to be innocent. I had told her after the first go around with this that I wanted to meet this person she was texting (it was a co-worker) because if this was someone that she spoke to that much I would at least like to get the to know them. This now being two months later and a few more fights has yet to materialize. She often talks alot about work and what goes on but I always get the point that she is leaving something out. She is still fairly distant and builds up walls of her emotions. I don't know if I am a fool as I have no hard evidence of anything going on but alot of stuff that leads me to believe things happened although she strongly denies they did. I don't want this to end for our and the fact that it could be a good thing if we could go back to what we had a few years ago. I guess I am looking for advice/opinions on what I should say or do. We are currently not in a good place, with another fight just happening earlier this morning. I don't know if I can just believe what she has told me and move on as she has been caught in multiple white lies about this whole situation. Thoughts?