no, i get that a lot. i guess random questions asked back to back throw people off. thats why i try to make a point with every question so the answer is similar.
and yes, there is a dark side, if there wasnt, there would be no Sith. but because the Sith were suppossedly destroyed after Darth Sidious and Vader, then yeah, now, there is only the force. does this mean the dark side cannot come back? no; if someone in the galaxy knows it either still exist or has existed then it is always possible. i see what your saying though about there only being the force.
"there is darkness in you Jedi Knight, i can feel it...."