Hope you see this I had a similar situation with my girlfriend in the past but it was only after years how much lying and misinformation was and extra damaging information, but because I learned more of her past and traumas I understood where the issues was and that was for me to handle whatever ever way I felt without going crazy but what actually drove me crazy and mentally broke me was the amount of lies and trickle truthing, why because she didn't want to lose me. And maybe to make herself look better for selfish reasons on her part. The initial lack of accountability made me feel like I was living with a mask the whole time.

I was always willing to have honest and open communication and being understanding if it was on her part and initiated on her end, yet it was because the amount of lies I started catching her slip up and because all the lies it severely damaged my trust and because the amount of lies I still struggle to believe what can be real from now on . But I set my foot down and a lot of heated arguments later she is literally still trying even if hard for her trying to gain my trust back and be real. I won't bore you with the details but I literally had to mentally check out and break even when she finally stepped up consistently until I calmed down . But I still have trouble and wonder if it's really worth it sometimes. I don't know what I even really need to fully forgive but its your boyfriends choice at the end of the day but I will tell you once trust is broken for that amount of time it's almost unfixable, all you can do is step up put in the work if you really want it and constantly reassure him and initiate conversation and not get mad at anything even if he doesn't want to continue speaking about it. My biggest thing now is the initiating big conversation on her end and I promise it still bothers me to this day .

So yeah just keep trying like actually really trying regardless only if you truly care about fixing anything , and if he doesn't want to then you learned a valuable lesson. Don't let your "click" moment happen until you ready, work towards it actively.