BPD's are amazing fvckbuddies.
But the problem is BPD's don't want to be fvckbuddies, they will mold themselves to your character, they will be a perfect extension of you. If you like a certain band, they have all the albums and know all the lyrics, if you read certain books, they have read them and watched all the documentaries as well.
If you like traveling, they have been to all the places you have been and will make plans to go on a trp with you.
They will buy you gifts, and dinners, tell you that you were the one who saved them.
They will clean your house, with pleasure, cook you food to impress you, tell all their girlfriends how luck they are to have met you.
And they curl up to you like a little girl to snuggle you. They have high sex drives and will do anything you like. You will feel like you met your soulmate.
Once you feel like you found your perfect match and you have been isolated from your friends and family and other girls, because BPD's will take all you spare time.
This is when she starts to withdraw, she will stay out with friends more, sleepovers with strangers after parties "but nothing happened" (which she will tell you the next day at 5pm when she finally answers the text of 10pm the night before).
She will tell you she is losing attraction, it's something you've been doing, you have been controlling and demanding, it's you.
She will tell you about an ex that keeps calling her.
She will tell you that you have changed, although she is the one who really changed.
She will start drama and if you stay your ground she will give you the silent treatment.
She will smear you at her friends.
She WILL CHEAT.
This is the part when you should have gone completely NC.
If you stay she is gonna use every weakness you have against you.
She will tell new guys she's curling up to like a little girl that you were a controlling manipulative baby boy, she will tell you that the new guy can make her squirt 4 times in a row. She will tell that she was convinced to have a threesome with the new guys friend, not because she wanted it but because she used ectasy and the new guy is such a bad boy who treats her bad.
BPD's are Satan's offspring, they will utterly destroy you.