My best friend Anthony and I have been friends since birth. Our parents have been friends with each other before my friend and i were even born. Anthony has also supported me through hard times and we were like brothers before this girl came in the picture. We are currently sophomores in the same college and he has been dating this girl for about 7 months. Lets call her Anne (Not her real name). Anne is a HB9. I usually don't flirt with or pursue my close friends girlfriends but i couldn't resist her. In our first year we had a flat party but Anthony wasn't present. I flirted with her, she flirted back and got her number. Anthony and Anne relationship looked flawless from the outside and she made him very happy. After months of being friends with her I saw her at the university gym about 3 months ago and after an hour of gaming her, she invited me to her flat and we had sex. We both decided to keep it a secret and hooked up twice after. We sent nudes to each other and had dirty convos as well.

Anthony, Anne and I stay in different residences near campus but not too far from each other. He called me a month ago to let me know he is furious with me and he would have physically attacked me if our families weren't so close. He found the nudes and texts between me and her and Anne also confessed to him shortly after. My heart sank I told my bro i was sorry. He hung up and that was the last I heard from him. Anne also texted me that Anthony broke up with her and hasn't talked to her since. I saw him at the gym entrance 2 weeks ago he had just finished a session. I quickly went to him and quietly apologized. He said i don't exist to him and ignored me.

This was his exact words "Just fuck off bro, you're dead to me, fuck off!"

I feel like shit...I miss my best friend. We used to go gym together and had many great memories but this is a consequence of my actions. I have fucked a few women with boyfriends and husbands without feelings remorseful but this was my friend, my brother i betrayed. For the past 2 weeks I've been furious and raging with myself. I need your advice on how to win my best bro back and how to stop feeling like shit and how not to let women fuck up my brotherhood with other men.

TLDR- Best bro and I go way back. Fucked his gf, he found out and cut me out of his life and i feel like shit. Advice pls?