Eric Forman and Donna Pinciotti relationship

Eric secretly liked Donna for a longtime until they finally started talking to eachother and then Donna started to like Eric, eventually they start going out and later on in the series, they get in gaged until they wedding where Eric descided to not show up, cancelling the wedding because of his absent. After, they get back together, break up due to a long-distance relationship, then finally end up together once and for all in the final moments of the series.