what season did darlene break up and get back to gether I think it was the 7th season but im not sure can somebody help me out?

That is correct!

Okay, well, I think they broke up because Darlene was going to school in Chicago and David still lived with the Conners. They got back together because Darlene realized that she still loved David and with little help from Rosanne, she swallowed her pride and told him.