This movie is about two brothers who didn’t get along and their father dates young girls, there’s a scene in it where he went in his brothers room and something happened and they started fighting and his asthma came on and they had to look for his inhaler for him, He also went to this group session or therapy session because his parents was getting a divorce and he met this girl there, where at one point his brother or friends tried to rape her when she went in the bathroom after she was flirting with them,he was also training for an Athletics competition,there’s also a part in it where he told his brother that their father has a new girlfriend and he said” how old is she, 12″
Maybe “Things Behind the Sun”?
https://en.wikipedia.org/wiki/Things_Behind_the_Sun
Its not it but thanks anyways 🙂