Im gonna delete this within a couple days because I dont want it on my profile permanently, I just want to know if any if this is potentially a BPD thing or something else.

For years ive found myself telling lies, id say more than the average person, and usually a very different kind of lie than the average person tells. Even as a kid, like 12/13, id catch myself after saying something and think "that wasnt true, why on earth did I say that?" And i am still repeating that now. Because usually there is no reason at all for me to tell the lie. Sometimes its a lie that makes me sound more interesting, sometimes these are small, sometimes theyre big. But it isnt like people would think Im boring if i didnt tell a story about myself, i dont know why i lie in that sense because theres no reason for it. Its very frequent, multiple lies being told per day. 

Sometimes these lies can fuck me over in the future. When me and my current partner started seeing each other, I told her I "went through a phase" of sleeping around with a lot of people, this could not be farther for the truth. In fact, besides her ive only slept with TWO people. WHY TF DID I TELL THAT LIE?!?! IT DIDNT BENEFIT ME AT ALL, IT DIDNT MAKE ME LOOK COOL, IT DIDN'T HELP ME "AVOID AN EMBARRASSING SITUATION" IT PUT ME DIRECTLY INTO ONE!! Its something she still occasionally jokes about, i feel like i can't tell her the truth because then she'll know I lied and she'll question everything ive told her and she'll question the foundation our relationship is built on. I dont want her to lose trust in me.

Do you guys have any advice. I really dont know how to stop. This has been something thats plagued me for years and im still no closer to finding the control to not lie like this.