Key relationships of Melinda?

Rachel- she was Melinda's best friend, and she turned her back on her.

Heather- the friend Melinda never needed

Mr Freeman- mentor, trusted advisor (although it took a long time to get there)

Nicole- not what you'd call a good friend, but I believe that Nicole cared about Melinda

Melinda's mother and father- These should have been the first two people she could have turned to, but they weren't. Melinda's parents are the poster children for disconnected families.