Dont do drugs

Guys dont take drugs. I made a horrible experience while trying and also - never trust anyone. So here is why. I had a gay friend (Not anymore because of what He planed to do) who was into me but im not gay. Even though i liked him as a friend because He was fun and Helped me good as a wingman mit Woman. But once in a while He wanted to take drugs with me and i always refused. One day i was hanging out with another friend who knew an actual drug Dealer, we went to that guy because my friend wanted weed. So after arriving and seeing them taking drugs - i still refused, i asked him about poppers and ketamine which my gay friend was always refering. He was giggeling and did Not really answer the Question but called me little gayly while preparing a bag and then gifted me a bottle of poppers and a line or two of Ketamine and told me to try it and If i like the reaction He would get me and my Friends more. I was super confused and looked at my friend who smiled in a way telling me to take it. And so i did. I was so confused that i did not asked again but also after another 40 minutes of geting called little gayly, i left early without my friend and went back home.
And here it happened.
It was a very hot afternoon in the summer too you know. So i got naked and chilled in my bed. I was Looking at the bag the Dealer gave me and i was thinking about If i should call my gay friend to use it or trying it out without him in secret so i knew what it would do and be prepared the next time He asked me to take this stuff with him.
After a while i also thought of just throwing it away but i was to curious. So i called my dog Rupert, who is a male boxer into my room just in case it knocks me out so He could bark for help or so. I was alone at Home my parents werent there. And i trusted in my dogs instincts...well He never Showed behaviour like that but i was sure He would take care If things Go wrong. Rupert is a male dog unspayed and was used already for breeding several times so what happened now was intended by him....
The Dealer said i should sniff the ketamine and then immediatly sniff the poppers. And so i did. I prepared it in my table and took it. And it knocked me strayed down. I felt a rush of hornyness and then all my muscles relaxed and i felt dizzy. I felt from my chair down to the ground. Trying to get back up the most i got was lying with my upper Body on my bed. And then Rupert jumped at me. He barked so i thought He must smell danger but when He mounted me that was strange....i was so relaxed, barly able to move but it also felt good so i Just accepted everything to come.
Bad mistake. I wish i would had rolled down the bed Afterwards. You see i did not know what Rupert was going to do and i was dealing with the drug so i wasnt ready for this. Rupert hit me. With His dick. And he hit nothing more than my anus. BUMP! With litterly No effort He pushed His dick Inside my ass. There He started to cum Inside me while thrusting. I felt like hours even though it was just Minutes. He gave me a rough time. I was so confused i didnt felt pain but rather orgasms! His dick started to swell into an enourmous size and His thrusting was massaging my prostate. I moaned loudly and even shot several loads myself. We were together for another 15 Minutes After He finished due to him and me being tight together because of his big knot. He had to swell down. And then He seperated. I was still lying on the bed for more than 3 hours because of the drugs before i was finally able to control myself again. I cleaned myself and was really depressed Afterwards. My dog raped me and one of my best Friends tryed for months to do it! I hated my Dog and my ex Friend from that day on. So i cut all Strings to that rapist of a friend and i still have to Deal with my new dog phobia. You guys have any ideas how to deal with that?