It’s not Lilya 4-ever (2002).
Approximate release date: 2000-2015.
The protagonist is a short haired brunette, she’s in high school.
She often wears red sneakers.
She lives in a dilapidated building that has an architecture that could be European or Russian.
Her father is very abusive towards her.
She’s not that outgoing but she becomes friends with a girl who is and they go to a club (?) together.
In the club, a guy ends up flirting with the protagonist, they go to a toilet, he pushes her head to his clothed crotch, expecting a blowjob but she just freezes there and does nothing. The guy leaves and the girl vomits due to the stress.
There is a bathroom-scene when she looks at her own vagina, using a hand mirror.
A boy from school, who looks like Matt Bennett, is in love with her.
This boy fabricates some kind of angel wings as a gift for the girl to wear. He gets ridiculed for this by his peers.
The girl refuses him and he kills himself.
She learns about his death from the mother of the boy.