Cheated on multiple times

Hello, I am new to all of this but I don't know where else to turn, I have been in a relationship with My boyfriend for over 2 and a 1/2 years. Our relationship was great In the beginning , in October of 2021 my boyfriend moved in with me. One month after he moved in I discovered a text on his phone from from a person he named as Glenn, I Contacted the person and discovered it was actually Michelle, a woman that my boyfriend had been in a long distance relationship long since before the begining of our relationship ! I also discovered that he was messaging several other women sending emails in hopes of possibly meeting them , He is in recovery from addiction and was supposedly clean for over five years , He is a drug and alcohol counselor That interacts with all kinds of individuals including women one of which he had been a group counselor for and was continuing to email and text her inappropriately for over a year, I ended up trying to work things out with him after his pleading with me that it was all part of his addictive behavior, that he loved me and only me , I have total access to his phone and emails, he has vowed to be sincere and honest with me . I cannot let all of the past go , everything that we do reminds me if him cheating, I also discovered that he went to lunch with a single female coworker alone recently , I expressed that I was not okay with that and two weeks later he did it again , there was another coworker that was supposed to go with them but he canceled at the last minute both times , I did confirm this . I love this man but I feel like I am losing my mind at times , I still don't trust him and the last time he went to lunch with the coworker he lied to me and said that other coworkers were there . He said he lied out of fear of losing me ,I Contacted the female coworker and she is adimate that there is nothing going on between them ! Please help !!!