A high school senior in love with his best friend seeks to redeem himself to her and his friends after neglecting them in the depression of losing them when they all go their separate ways.

Agreed with DPG.

Also, the wording is confusing, try to streamline the logline so it describes only the major events in the order they occur.

What does "redeem himself" mean, exactly? ?How does that translate into a specific objective goal?

What is the specific inciting incident that triggers his pursuit of that objective goal?

Who is the antagonist/rival or obstacle that stands in his way that he must overcome to achieve his objective goal?