Is it more than a Lie?

Hey,yall , I really need some clarification here, I believe he´s a narcisssit, that is making me feel like i am the crazy one, I am over-reacting etc.

My boyfriend of 2 years (known each other for 6) lied to me about helping his ex gilfriend redirect her letters. They would arrive to his apartment, because she was in the process of buying an apartment. He explained she asked him for this favor after they broke up. And the reason for the break up was her mom died in cancer, she started partying and ended up cheating on him.

I didnt like that i found out about this and He promised me he cut all contact off and told her to change her address so the letters stopped coming. I got hurt, and shortly after this confrontation he ghosts me. 17 Months later he comes back (I was in therapy,had zero contact with him) he convinced me we start over again and he had nothing to hide – i´m his soulmate, and he realized he wants to be with me. I was so unsure , i didnt want to undo all my hard work for 17 months, and I said it will take time to rebuild my trust for him again.

Last week we were in the process of moving in together. I caught him entering her address into his computer and asked what´s going on, I thought the letters stopped? He explained it’s because he needed a residence card and at the time he didn’t have an address – me and him were broken up (he ghosted me) and he reached out to her, and asked for her help – it costed 1500 dollars to get a new adress so he just wanted to do it for free and she was the only one he knew who had bought her own apartment. When confronted why he went behind my back, tricked me into getting back with him, it was all supposed to be a fresh start, he said its just letters, I havent cheated on you.

He was being very evasive of any questions when confronted, I felt really upset and started shouting at him…why the hell are you doing favors for you ex for years and going behind my back? Not once but twice?

HE said know it looks bad but it’s just letters. She only send me 1 letter every 3 months. Now I didn’t believe him. So i asked to see the messages on his phone because this situation makes no sense, he refused for 7 hours – He was holding the phone the whole time and scrolling back to november but i said, that´s not the recent message, instead just 2 days ago. they were texting every week – only 2 pictures of letters in 6 Months,and all the 200´s messages were her asking for advice on work issues, birthday wishes etc

Now I knew he lied nHe also started crying how he feels sorry for her mom passing away 5 years ago. He feels no need to be nasty to her? Yet i was being so hurt and crying , but he cared for her? Doing favours and hiding from me?

He keeps reassuring me that he dosent have any feelings for her, he only loves me? He also said she has a boyfriend and she would laugh in my face. He said hes with me cause im trustworhy and that she’s a bitch who cheated on him why would he be with her?

He’s asking for forgiveness now, there was nothing going on, he believe he proved it too. I feel the opposite. She dosent even know about me. He still got photos of them on Facebook never put any of mine on his. Or even added me on Facebook. He thinks im jealous of her? I am not, i am upset he lied to me so many times? Does he really have feelings for her, i mean he cares enough to help her out with work etc, even if it´s just text and they don´t see each other.

He’s also told me to contact his ex and ask her and she can confirm there is nothing betweeen them?. He also said he’ll block her and change address but i don´t think he will do this. Just like first time it happened. Now hes asking me to reconsider ? Am I wrong here for not trusting him? Should i leave this relationship and never look back? Am I the crazy one again for discovering this? It just happend by accident, both times. Is this a sign?????

Someone please help me out here :(
Thanks