Six years ago, Annie (Casey Wilson, “Happy Endings”) and Jake (Ken Marino, “Eastbound & Down”) bonded over their mutual love of nachos and they’ve been inseparable ever since. Now, after returning from a romantic two-week island vacation, Jake’s all set to pop the question. Before he can ask, though, Annie lets loose on Jake for his inability to commit. She was expecting him to “put a ring on it” in paradise and now Jake’s perfect proposal is ruined. Not…