He told me that he had his own place but...

Last night , I went to my guy friends house we ended up having sex. We didn’t cuddle after like the usual. I knew something wasn’t right , he told me that , his sister had been staying with him so don’t think the clothes is someone else’s. After we got done having sex. He gave me my clothes , he never did that before so I was like something isn’t right. I went to you use the bathroom and he went outside for some reason. When I came out of the bathroom I heard tussling , like someone was fighting. I didnt know what was going on at first .I heard a girl saying you had this b in my house. I was like woah , is this his girlfriend? He told me that he had his own place but come to find out he has a girlfriend that he is living with/ off of her. I went to out off the door , him her were fighting he was holding her back because she was trying to fight me , I told her I’m so sorry , I didn’t know that was her place and not his. I believed him , I never felt so betrayed in my life. I got out of there. Drove off , when I got home i blocked him off of every social media and his number. Im starting a new chapter in my life I just turned 21. I’m going to focus on myself. But now my trust issues with guys have gotten worst.