Understand Your Thought Processes/About

i would like to understand why i say things to people such as i was at a party a few weeks ago with my boyfriend and while we were there i was texting one of my guy friends something that you shouldn't say when you love someone ..i told the guy if my boyfriend wasn't there i would take him in the back room but i really wouldn't have i don't even like him like that and i love my boyfriend even though me and my boyfriend have been through a lot i just want to understand why i said it so that i can explain it to my boyfriend