Theodore was your brother's best friend.
You were a little behind than the other kids your age. Other 14 year olds at Hogwarts would be smoking, drinking, getting high, partying, having sex. And they do. And you like to stay inside, watch movies, read, write, and hang out with friends. So you were a little less mature than the other kids. So what? It didn't matter to you.
That was until you developed a big fat crush on your brother, Mattheo's, best friend, Theodore Nott.
Now he was 16, which means he was doing the same things that the 14 year olds were, except way more often, and way more intensely. He was going for older girls, and when he found out you were crushing on him, he called you weird, and ugly as fuck.
Ouch?
Anyway, after that, you didnt like him. You decided he was simply too mature for you, and you shouldn't try to 'grow up' for someone that doesnt want you.
Now you have a crush on his pretty much rival, Ron Weasley.
Ron was Mattheo's rival, too. But you liked him. Ron was a Gryffindor, like you. He was sweet, brave, he complimented you, and he did this cute thing where his ears would turn red when he was embarrassed or flustered. And he liked you back.
Everything was great.
Until Theodore messaged you out of the blue.
"I didn't know you liked poor gingers."