Well - 2 likeable people might not equate to those 2 people forming a special bond or connection - platonic or romantic. We each have our own preferences about who we choose as friends as well as partners. Actually, it's not even a choice most of the time - it's just chemistry.

But - if you do find yourself with somebody of your sexual orientation - and you find chemistry as a friend, does that mean that given enough time you will find enough chemistry as a partner?
In other words, can you remain platonic indefinitely if you feel a connection? I say usually not.