A young ex basketball player finds himself falling in love with his best friend, but being feared to hurt her due to his post-traumatic stress disorder, he must learn to cope in order to move forward with her before he lose her for good.

This concept doesn't grab/hook my attention, it's a love story - boy meets girl, boy falls in love with a girl, and they end up together. The main reason why this concept fails to grab me is the generic descriptions - "...young..." means nothing in a logline, as life teaches us, that word gets redefined the older we get. A fifteen year old work experience assistant I had a few years ago, called me an old man on account of my 35 years of age at the time, I doubt he would do the same when he reaches his thirties. Is the MC a teenager, early twenties, mid twenties or late twenties?

In what way does his being a basketball player help or hinder his efforts to get the girl? It doesn't sound like it does either, is there a better description you could use for the main character?

What makes love stories, and especially boy meets girl stories, interesting is the force that keeps the lovers apart. In this case, you chose PTSD, but what's not clear is the actions he'll take to overcome the condition, that's the bulk of act two - the meat of your story.