A lot of people seem to dislike the episode Story for Steven. Me personally, I liked it. Now I'm not against people's opinions. If you dislike an episode, that's fine. There's no accounting for taste, your thoughts are your own, etcetera. But one thing that weirds me out is that people think Rose and Greg's meeting was "love at first sight."
To be honest, I don't think Story for Steven was a love at first sight story like so many people think it is. At least when looking at Rose. She was just interested in his music at the time. "He was playing a concert on the beach, and I couldn't help myself." Plus, she said she wanted to "Play" with him, nothing involving love or anything.
As for Greg, he was still very young (probably early to mid twenties) and most likely didn't fully understand what true love was.
Rose and Greg most likely started out as friends and became something romantic. But hey, that's just my personal opinion on the whole thing.