Buck got jealous. It always got the best of him when you hung out with someone other then him. He tried to hide it though ended up hurting you when he did.

You had stopped by to clear some air between you and him. You we're friends after all and wanted it to stay That way.

As you we're talking buck stepped forward, still talking to you. He watched how your lips moved. His body acted quicker then him mind could process and his hands went to your cheeks as he kissed you. Catching you off guard