I was talking to this girl online for about a month and I felt like I made an actual connection with someone, I was aware of her BPD but I was only told I was the favourite person which I understood fully and wanted to work through a relationship even with this added difficulty.

 The whole "relationship" went so fast probably because of her BPD, she pretty much lead the way. Understanding the Chameleon effect now puts everything into place, she admitted that she mirrored my personality through looking at my Instagram highlights I didn't think anything of it but what it meant was she was pretending to like my interests for example my friend had spoke to her before but stopped because of religious reasons, but during them talking she started becoming Muslim for him, but when I started talking to her at the start she was talking about no sex before marriage but the act quickly dropped and she became a different person.

I am very into going to the gym and when I asked her about the gym she made it seem like she was a gym girl I think to appease me, this doesn't work as I don't believe she even likes the gym and is not at a healthy weight, it got to the point where I was asking her to lose weight for me to conform to what I thought she was. It's awful that's why I chose to stop speaking to her, I feel very betrayed but I can't be mad at her as she was extremely understanding of my conditions but the girl I liked didn't even exist and was merely a product of BPD this meant to me the relationship couldn't work. I ended up calling her a catfish , I kind of wish I knew about the Chameleon effect more and addressed it like this but all in all it was never going to work so I don't stress. The way it ended she gave me the option to leave, like she was saying "You can leave idm" "I only wanna be in a relationship with someone who loves me back" but you tricked me into thinking you were something else, the way she acted was like she got caught red handed and didn't want to take the blame for it.

I feel like I am posting this here as it's on my mind and I want someone to relate to or understand as its just completely left me in shock, I feel bad for her as it isn't her fault and is just a part of the condition although I feel very deceived. 

(some of the things I may of said in this might have been offensive please correct me if I am wrong)