Excellent post (especially the bolded part). If I were to choose top 5 posts of all times on the forum, this will be one of them 
This changes with time. The better you get at dancing and the more organic and natural it starts to feel, and the more adept you get at improvisation and enjoyment of the dance itself, and the more heightened your senses become to music and movement, you'll start experiencing the 'fix' less often (because you are now discerning, and demanding). In turn, you'll also be less insistent on dancing every day and all the time, and you'll relax and start rediscovering the normal stuff - like movies, and picnics. You'll start reintegrating normal stuff sometimes even if that means missing some dances... as you start hitting this stage, you'll realize that being surrounded by men or women in a dance is meaningless fluff the context of life outside dance.
Some people are lucky to have many intimate people in their lives - through family, friends or intentional community. Others often have only a handful of intimates, and they are lucky if any of those are geographically nearby. And some of us have (almost) no intimates nearby. Whether or not one can continue forever without looking for an SO is often a function of how well your needs are taken care of by your life. If you have proxies for emotional intimacy (friends, family), physical intimacy (dancing, occasional hookups), emergency support (friends, family) and community (salsa friends, other friends), then you are set, and don't really have to go after finding an SO. If you don't have all these covered, then the longer you wait and remain single (for the sake of salsa), the worse off you'd be for having wiled away that time... dancing doesn't replace real friendships and relationships that are formed through common activities outside of the dance floor.
It's of course challenging to date in the dance scene. Most of us need to date a bunch of folks before finding The One, and having many exes in the scene is a pain. Even if a breakup is amicable, there is always some residual tension (sexual tension, tension from one disappointed party, nostalgia, residual affection...), and pursuing the next and the next and the next relationship in this 'community' becomes increasingly taxing on ones emotions.
A common solution is to find partners for dating from outside the dance community. A less common (but smart) solution is to start learning more dances, and create for yourself a secondary and tertiary community from where you can draw potential dating partners... another common solution is to give up dancing...
Some people get lucky and find a soulmate through dancing. It happens often enough... the rest of us need to start having an intentional approach to this, or remain vulnerable to the capriciousness of life and hope that you'd get lucky someday.