I will respond to each of ya'll respective to the order of your responses.
@13cmk: Narcissistic? Haha. You wouldn't be the first to suggest this, but if only you really knew how erratic my sense of esteem is, you'd likely swallow your assertion. My high's and low's are incredibly unpredictable, and sometimes I'm just a menstrual cycle away from losing it.
@doodler: Thank you ever so kindly for your input. Yes, you're absolutely right (as far as I'm concerned, anyway)--I do believe that, on some level, it's a subconscious attempt to prematurely sabotage the relationship before I'm confronted with any sort of rejection (real or imagined). My father was always rather critical of me, and I've not a fraction of doubt in my mind that I've ever so deeply been indoctrinated with this mental scaffold and colored my self-concept with overwhelming self-doubt, disdain, and criticism. In any case, I really appreciate the thoughtful nature of your input...it's refreshing to be able to speak so candidly about these types of issues without the burden of judgment.
@jaus tail: Oh, my apologies. While I appreciate the feedback, I think that you're kind of missing the point of my original post. My concerns aren't rooted in my ability/inability to please him sexually (I'm rather confident in my ability to do this, actually)--it's more or less that I feel that his capacity for true, unadulterated intimacy is fragmented (or otherwise nonexistent) due to the promiscuous nature of his past. People can tear me up and down, side-to-side--and I don't care; I believe that (for me and whomever I'm with, anyway) that sexual intimacy should be reserved for a context that's founded upon committal love and adoration. His sexual past doesn't threaten my self-esteem as far as my sexual abilities are concerned; it more or less makes me feel that, at one point or another, he didn't value sex...and that if he has the capacity to not value sex, then is sex with me really meaningful to him? And of course, this brings into question as to whether or not I am worthy and lovable enough (in his eyes) to merit his newfound desire for monogamy...so it's inherently more complex of an issue than whether or not my sexual repertoire is sufficient enough for him, if that makes any sense. Needless to say, my borderline personality has a sort of voracity for this kind of thing--perpetuating this myth about myself that I'm unworthy and otherwise defective. While it may not make any rational sense to most, it tends to make perfect sense in my own mind. Nevertheless, I'll take your advice and opt to communicate with him more. Thanks for your two-cents!
@monkey66: Wow, that's quite a situation. I'm so glad to hear that you guys were able to successfully navigate yourselves and your relationship through such challenges--I think that it can safely be said that many couples (borderline-ridden or not) would've more readily called it quits. You two must love each other

And yes, over the course of the past couple of months or so, I've been making a more earnest attempt to wholly feel and experience the magnitude of my emotions (in the most raw and unadulterated of ways) so as to work on inching my childhood wounds and such towards some sort of closure. To my delight, I'm finding that it's been incredibly advantageous (particularly when I would've otherwise sparked an unnecessary fight between me and my boyfriend). I hope that things continue to progress further within the context of your relationship (and yourself, of course). Thanks for your support