AITK for sending request to my boyfriend's friend from my fake id?

I, 21f, is in relationship with a guy 25M for 1 year now. I share everything to him and vice versa. Although he is a bit insecure types, so he actually tells me to not tell him about my past crushes or boyfriend. But i am pretty chill about his past and want to know everything.

Everything was going smooth but one day when I was with him, i opened his chat with his friend. I was not looking at the chat to deliberately find something but, just out of curiosity, I wanted to see what they talk about.

I found chat couple of chat having my name and another girl's name. Those conversations were from the time when me and my boyfriend were fighting. So he was messaging his friend; should I text that girl (let's call her p). I got furious but he defended saying p was his friend's girlfriend but she used to hit on my boyfriend. So sometimes he teases his friend. I got angry, i couldn't believe his story, we fought and soon after i calmed down.

Him hiding anything from me, when i don't actually care about his past was bothering me. I asked him multiple times to share a picture of the girl which he didn't. He kept delaying it and I got frustrated. I made a fake account to send his friend a request so that I can myself see her account. But my boyfriend somehow found it out. Now he is angry and saying probably I fell for his friend. He is also saying that he's embarassed of my behaviour. He has stopped talking to me despite of my constant apologies. So AITK.

Thankyou for reading.