After this most recent request came from someone I consider a very respectful and kind man, I've recalled  that many of my exes from the past 16 years have expressed their desire to remain sexual partners despite their disinterest in continuing our relationship as life partners. Even though I may be heartbroken over the breakup, the suggestion still comes up. From the best to the worst relationships I've had, this request comes up nine times out of ten. Even the first person I slept with has made the same request, so I can be pretty sure that it has little to do with my sexual prowess LOL. 
I don't know why this is such a recurrent request. Is it because I have somehow demonstrated flexible boundaries and empathy thereby allowing them to come to me when they are lonely or sexually frustrated or ??? 
I am deeply disturbed by this ceaseless trend. It's like the people I've been with think I'm only good for sex and friendship and not one of them thinks I'm good enough for commitment. Since I've dated a broad spectrum of people, both respectful and disrespectful, and they more often than not have conveyed this preference for my attention and time, I worry that this will be story of my love life. Has anyone else here had the same experience?

**I am 34/F and I was diagnosed with bpd a year and a half ago. The diagnosis came as a complete surprise at first, but after reading the symptoms and doing even just a shallow examination of my life, this diagnosis makes sense to me.**