I don't think Simon would give up or move on so quickly. I mean, he's a good guy. And a good friend too. I think think we spoke on here but I'm Maxxie, one of his friends that does art and dance. I've even done drawings for his cousin and other people too.
Plus you also shouldn't worry about the "moved on" thing because... well, if he has a guy with your gorgeous looks as a BF, doubt he'd let go of you that easy. I'm sure everything would be fine once you're talking to each other.