try and be there for her as much as you can
Can she ask one of his friends,has she noticed any changes in his behavior leading up to this?
All her azz needs to do is stop being all up in his azz. Shes playing right into his hand he knows its driving her crazy not knowing why he isn't talking to her. Tell her to stop calling and texting him also put fake sh*t on Facebook show him shes having fun without him
Get out the friendzone and hit it
3some bro think out side the bun
Half crazy half azzhole