Ya, it does seem like a big world out there doesn't it? 6 billion going on 7 is a bit overwhelming. But I like to look at it this way:
(Based on certain assumptions, these admittedly very rough stats are different if you don't happen to conform to this)
Only 84% of the 6 billion are unmarried, leaves 5,040,000,000
Only 50% of those are of the opposite sex, leaves 2,520,000,000.
Only 90% of those are straight, that leaves 2,268,000,000.
Only 73% of those have reached puberty (over 14 years), leaves 1,655,640,000.
Only 4.8% of those speak english, that leaves 79,470,720.
Of course there are many other narrowing factors, for instance, if you are gay or lesbian, the stats might look more like 8,830,080.
Another big one would be knocking out those who are currently incarcerated, or otherwise institutionalized. Soon you see that the possibilities are not as overwhelming as it seemed. When you knock the elderly population out of the mix, things start to look truly promising.
In the end though, you will just know.
Best of luck.