Hard To Take Seriously

I just recently came into a situation that I find weird. My best friend has started to date exclusively a girl named Anita. I know her and my best friend know her. The thing is in high school and college we all remained friends with benefits. Yes I fucked her he fucked her and another one of our friends fucked her. We would literally just kind of past her around. She is hot taller 5 foot 7 small tits thick thighs large bubble but. We have took her to spring break and we did her that week sometimes me on one end and him on the other.
I have been in every one of her holes and I am sure lots of guys have as well.
We all met together at a bar last night and he showed up with her. I didn’t think anything of it. A few of us went back to my place and by the end of the night I had her bent over on a lounge pumping away and then she let another one of my friends mouth pump her. My best friend was inside kind of drunk. After a while we went back in and she went right over to him. I didn’t find it weird I figured she was going to fuck him to. That’s when he said we should get going and he mentioned to us that they had started dating. My other buddy and I looked at each other and then at Anita and we were like WTF. She excused herself to use the restroom and I followed behind. She stopped me when we where out of sight and said that yes they where dating but that would not change anything between her and I. I told her that’s not dating. I told her that her and I could not hook up anymore and I wouldn’t have fucked her earlier if I had known. She confessed that she had a thing for me and my buddy and that’s why she did anything we wanted for us. I was totally confused she begged me to keep everything that same and started to rub my cock. It felt good and I made her blow me in the bathroom before I pulled her up and spun her around. I was rough with her but and pounded her hard. I blew my load in her but and made her not clean up and walk out. Before she walked away I told her that she would be staying the night. She nodded and stayed. I used her holes last night and left a few minutes ago. She said that she would be back around 3 to pick me up for thanksgiving. I will be going with her to her parents home. We had a conversation and basically told her that I would be the one pumping her from know on. She agreed and said that she would talk with my buddy later this morning. She mentioned that he kind of knew what her feelings where for me so it would. It be that difficult of a situation. I’m not sure what kind of relationship I have with Anita but I know I like to fuck her and she like me to as well. I do like to see her get fucked so maybe this will all work out.