I actually like this start. It's pretty generic but overall fine and neither leads seem like bad characters so I'm interested where the "fake" relationship goes and how it leads into a real one.
That said it is actually hilarious how one sided the balance of their secrets are. "I was a famous child actor who was bullied into disappearing and blew up the internet and media at one point." / "I was a fat kid lol."
Even more funny because dating is probably though worst way to hide their shared secrets. It'll just make people more suspicious about their connection and look into how they know each other leading to their shared elementary school. It would have been better to move on and limit interaction. But again, interested to see where this leads.