You're so bad in the sack, you've converted me to lesbianism. If you weren't such a lousy lay, I might never have found out. I owe you one. Your boyfriend was probably telling you that he wanted to have sex with another girl, and you mis-heard. Since he wanted to do it with someone else, he probably won't mind.
Men are funny like that.
At least, he'll be happy with the knowledge you're looking for something he hasn't got. DIY Ideas Video All About Dating Liam outlines his encyclopaedic knowledge of romance, love and relationships. We've all gone out with girls who were nuts.