Long story short. My partner dropped bombshell last year which I felt was out of nowhere where he said he wasn't happy that he hadnt been in awhile that i wasnt cleaning enough, didnt want to do anything had no friends. Several things which i felt we could have talked about in a better manner. Said noone else was involved etc. He works away and all of a sudden locked his phone so I was constantly asking what he was hiding. He insisted nothing and nothing was going on between him and his female coworker who he text a lot. I then found out his pass code and he had photos of him and this coworker at the pub her arms around him smiling. Was a few similar. This is what he was hiding. I also found out he snapped her everyday for 4 months which he 'didn't know' he had a streak with her. He also text her a lot and met up with her for drinks a lot at work. He insists hes never been alone with her. He also told me he saw her as a sister and best friend which i can't believe as he never mentioned her personally to me only that he worked with her. Now I have never cared at all about what he does at work and this all threw me for a loop and now I can't stop thinking about what he does. He then lied and said he'd had no contact outside of work and had been lying for months. I found this out too. He promised he would change. I now find myself obsessing over every detail, every interaction he has with his female coworkers and have found lots of instances that i feel he is being too flirty in texts. He insists he's never cheated or emotionally cheated. I know he is a very outgoing person and is nice to everyone but I don't think he sees how he takes it too far by having nicknames etc for people. I don't know how to get past this feeling of betrayal and thinking he's just going to lie to me again. I am constantly trying to find out what hes hiding and its eating away at me inside. I am just sad all the time. I want to get past this I want to trust him again but I don't know how. Just need some advice as i cant talk to anyone about this.
*** Forgot to add he admitted to being in a dark place and says he doesnt know why he has done certain things and still cant explain why and that he was depressed and has addressed this and seems a lot better now.