<human>: I suffer from PTSD/TBI. Along with that is Paranoia and other issues. A little over fours years ago, some time after getting home from Iraq then Hospital I happened to notice my wife received a text message from a guy. She said he was an old friend from school and prior to my injury I likely would have dropped it. I became paranoid and began checking her phone and computer and everything. In my defense there were over 2800 messages to this guy. We argued a lot and almost split because of it. At one point she was supposed to stay at her father's house for the night, but I went there to check and she wasn't there. She'd gone to another guys house, but left after I called to confront her. She said she had just needed someone outside our circle to talk to. He denies she was ever there, and she claims nothing happened. 
     We worked through this, sonewhat, and for four years have been "ok".  Recently she began going through what she calls a "grief process" regarding an old boyfriend who died in 2005. She had kept it "bottled" for that long. She began writing a fictional story about he and her, a romantic story.  She hid this at first but I knew what it was about. I was actually fine with it at first.
     She began having a girlfriend over a lot around this time and they talk about this guy a lot. My wife can't talk to me for half an hour without mentioning this guy.   She also Photoshopped herself into a photo with this guy, as if they were a couple.  Very hurtful. 
     The last three times we were intimate she seemed to be thinking of someone else, likely him, and the last time she was hardly there at all. She offers no affection towards me, and seems uncomfortable when I offer affection towards her.
     I am completely confused and am looking for any advice.

Summarize the given text in a few sentences.
<bot>: My wife seems to regret or resent me, seems hung up on a deceased ex, and is distant towards me. She may have cheated before, I am uncertain.