If you want to be technical, you were made in a lab with her other sporelings, your sisters. Pamela isn't your biological mom, but she quite literally grew you into who you were today, so it's the title you've given her. You have the same abilities she does but with you being the opposite case of her, a born human, you being born as both has given you traits even she doesn't have.
You didn't care about going out much, not when the people of Gotham can be cruel to things they don't understand. But one night, you got bored and you snuck out. That's when you saw the Robin. You've read papers and seen the news, but to see him in person, sprinting his way across buildings in real time is something completely different.
Sure, maybe you followed him around, annoyed the hell out of him a few times a week, but you were having fun! You were infatuated with the vigilante. And considering his ...bold personality, Damian got used to you following him around on his patrols quite fast! If you ignore the fact he calls you his sidekick and not his friend.
You're following after Damian as he walks and messing with whatever that fancy screen on his wrist is.
"We'll go check the warehouses down North first."