Thanks for the confidence. And Alger, it's not about people's affections towards me, it's about my own towards others. Four months is the longest relationship I've been able to maintain and the last month of it was mostly torment for me.
Though I'm sure you've heard this before, I think you ought to give the situation time as well as effort to work out. Sometimes these sorts of things are a result of a deeper psychological conflict and require a lot of introspection and soul-searching. Other times they're more of a "phase" that you could shed as you mature further and change lifestyles. I don't want to pry into your psyche, especially in such a public forum, so the following queries are more or less rhetorical. Have you thought about what leads you to this rejection of love? I strongly suspect you have, given what I've gleaned of your personality and intelligence, but have you been successful in determining any possible causes or event chains?
Another thing to consider is what effect each "failed" (I hate to use that word, but I can't think of another fitting one at the moment.) relationship has had on your continued ability to love. Maybe you should take a break from them for a while to sort yourself out, if you aren't doing so already.
Also, if it's any consolation, my record was zero at 18 years old. I didn't go on my first date or have my first kiss until after I had graduated from high school.