I'm sx/sp, and hopefully this gives the OP some insight if they choose to compare notes and see how alien I am to you.
I am extremely focused on individuals; the closer I hone in on them, the more sensitive I am to their greater qualities and nuances. Many people seem unmoved by their interactions with others to me because of my subconscious expectations of people to be more similar to my sx preference. I'm sensitive, even hypersensitive to individuals on my "radar". Qualities I admire, aspire toward, am sexually attracted to, or value, are picked up by slight cues I see in others. I'm easily reeled in. In fact, I would say I'm a bit of a sucker in that regard, since my taste is so particular that I have a very broad blind spot in acknowledging what would really be healthiest for me. I'll sacrifice myself to the point where my well-being becomes marginalized as long as I am able to experience the level of intensity I crave. When I am most productive, I am most like a male salmon, making almost suicidal leaps and bounds to subdue an instincual compulsion to
have sexget what I want out of life. I can recall so many accounts of me "locking on" to one person or another to be met with shutters, deflections, or The Ignore Feature because ignoring my advances is probably my biggest pet peeve ever.
There are times when my behavior becomes erratic, not unlike a randomly moving particle, because of my acute, but mostly unconscious sense of magnetism and repulsion from one individual to another. If I try to hunker down for an unbearable amount of time (I'm not talking about physically, I'm talking about mentally), I may even go ballistic; the repression acts like the metal coat on a hand grenade. My communication during times pocked with solitude overflows with intermittent expressions of bizarro behavior or gluttony for a particular craving. Even though I'm an introvert, many who are close to me have characterized me as an extrovert (not MBTI) because of how I make one-on-one interactions my playground in which most things are fair game. However, I tend to be more reserved in group settings in which I value others' opinions of me. At work or at school, around those who I don't consider as much, I have slight, forced outbursts of extroversion because of my desire to make an impact and gather how well I'm received. On the other hand, I'll come up with obtuse schemes to make an impact in ways that start out as more subtle but then develop into unforeseen surprises. Sometimes when I'm unintentionally strange, and I try to explain the reason in what I'm doing, I'm met with "I never know, with you".