My [f]etishes and how I discovered them because of my BF [m] and a friend [m]

First time posting on Reddit so please forgive anything I do wrong, and for the long post. I've been searching around trying to find out a proper name for this thing I've been feeling and I think it's part Cuckolding and Exhibitionist, but I'm not really sure?

To start off I'm 20, a girl, and in college with my bf of 8 months. A few months ago my bf got drunk and made out with my best friend at a party. He immediately came to me the next day and told me he regretted it and wished it never happened. I was so angry at the both of them, but mainly him because everyone knew my best friend always had a crush on him. We barely spoke for a week, but eventually made up. During the week we didn't really talk, I caught one of my guy friends (who my bf doesn't like) peeking through my window as I was changing. He's my neighbor in the next apartment and we were going swimming in the pool that day. He waited outside as I changed into my bikini, and I honestly forgot to shut my blinds. I immediately noticed him looking inside and trying to not be obvious, but it totally was, before I even began to undress.

Any other day I would have just pretended not to notice and close my blinds. Instead, I still had my bf making out with my best friend on my mind. I thought this was the perfect chance to get back at him, but I was also REALLY nervous because I'm so shy about my body. I always get compliments, but I'm so small (4"11) and my boobs are only B cups. On top of that I hadn't shaved in a week due to me and my bf not talking. I took a deep breath and began to undress, all while knowing my friend is watching from 5 feet away. I had my back to him so I didn't make eye contact by accident and the first thing he saw was my butt. I stayed that way for a couple of minutes pretending to rummage through my drawers for a bathing suit, bending completely over. I was SO nervous, but I felt really excited by all of this! I knew when I turned around I couldn't make eye contact or else he knew that I knew he was watching me. So, I turned slowly around and pretended to watch the TV in the corner. My peripheral vision caught him for a few seconds, and he had the biggest smile with eyes wide as can be. I tried to remain calm, but it was so hard not to show any emotions. Eventually I was done and walked outside to greet him pretending nothing at all had happened. He was smirking the entire time we hung out and I caught him glancing at me whenever he thought I wasn't looking.

Like I said though my bf and I started talking pretty much the next day, and I've never told him what happened. Even though I want to so badly to make him jealous. We are back to fighting and our relationship is definitely ending in the next week or so due to some other reasons. On top of that I did find a lot of Cuckolding porn in his browser history, so I think he's into it. That's why I think I don't feel too bad about getting payback, and not telling him. But, for those few minutes that I let my friend watch me undress I felt so excited and aroused! In that moment I wished I could have had him fuck me on my bed as my bf watched my pleasure. I just want that feeling back of showing my body to other guys because it turned me on so much!

I don't want to disclose the reasons, but if my bf keeps acting the way he does, I want him to walk in on me have sex with my guy friend. I know that sounds terrible and harsh, but trust me you don't know the reasons and the stuff he's doing. He probably deserves worse. Maybe you guys can help me think of better payback things I could do?

Tl;Dr: I think I'm a girl Cuckold/Exhibitionist and my bf and me are probably ending soon how can I use this to my advantage to turn me on and make him jealous?

Source: reddit.com/r/gonewildstories/comments/2zd9se/my_fetishes_and_how_i_discovered_them_because_of