I have a cousin who has BPD, and she is extremely sexual as well. There are so many risks to these sexual encounters. My cousin lost her virginity at 16 to a guy who treated her like crap (and who is now her future step brother), she slept with his best friend at a party a few hours after they had one of their many fights and break ups. She's been pregnant but it aborted because of her medications, she has had as we call (excuse me for swearing) f*** buddies, and had sex with guys before they became her boyfriend (probably more because they found sexual convenience with her rather than because they liked her), I even came across (accidentally) extremely graphic photos of her having sex with her boyfriend. She talks about sex so graphically it makes me cringe. But she is not overly educated in sex, she thought that by being on the pill she couldn't get pregnant.
And yes, I do think less of her because of her lack of morals. That is in no way directed at you of course. But with being overly sexual does come reputation. Not everyone is going to sympathise with someone and believe that a disorder is going to make someone have sex all the time (as we all know not everybody takes the time and effort to be fully understanding of what you might be suffering from). Then of course there are the risks of pregnancy, disease and abuse. And even if none of the latter are the case, the reputation of it can bring rumours of those things that people may just believe.
If you can, I would talk to someone about way you could lower your, uh, urges so to speak :P, perhaps try the above persons suggestions. If you are one to take meds (I'm not too keen on meds but obviously others do), perhaps there is something that can lower the urges? Perhaps you could try analysing what these sexual urges are about, there may or may not be some things underlying that are increasing it, such as a need to feel wanted or 'intimate', not just sexually, with another person, or unreleased tensions and energy that might build the feeling up even more.

Hopefully that helps a bit.