Got Ghosted

Alaister and Sabby were best of friends, and they just wanted to have a peaceful life together. Not until fate played a trick on them. Both girls hoped for a serious relationship, a man that will love her with all his heart. They met the men that they loved, and yet one of them didn't expect to be left out in the air. Who might be between Alaister and Sabby? Who - and why did she - "Got Ghosted"?