The reversed Knight of Pentacles shows an individual who has made an impulsive decision and is willing to take risks. This is a sign of sudden changes and a lack of patience. The Knight can also represent the need to face difficulties directly. In this case, it seems like your friend made a decision without thinking first, perhaps due to her eagerness to end the relationship.
The Star shows a person who strives for harmony and balance in life. This card also indicates the idea that there is a natural balance and that following it leads to happiness. The Star can also indicate that your friend is trying to keep his emotional situation stable and positive, despite the recent change in his relationship.
Bottom line, your friend appears to have been acting impulsively by leaving her boyfriend, while your friend appears to be more calm and focused on balance. This could mean that for the two of them, the possibility of reconciliation is still open, but it will depend on how they both deal with the difficulties.