Is it normal to be angry at my friend for having sex in my bed?

No It's not ok to have sex on your friend's bed, I mean for fucksake you wouldn't like it if you caught your friends fucking on your bed right ? So Just don't do it. You're in some one else's home so show some respect. It happened to me and up to this day my friend isn't allowed back art my house. Very tacky and downright desrespectul in my opinion