Friendmantic 

where one participant in the date fails at being romantic and automatically falls into the black hole of "the friend zone".

where 2 friends hold a secret of true love for one another, but keep each other in denial.

joseph was so much like lisa's brother in his actions that his dates were too friendmantic

though kelly and chris have a friendmantic relationship, they tend to show off steamy flirty actions to one another.

Friendmantic by camera2DP July 11, 2010

Friendastic 

The act of being sarcastically friendly. A proper fusion of the words "Friendly" and "Sarcastic", relying heavily on context and is easily confused with the combination of "Friend" and "Fantastic" (Friendtastic), albeit the meaning is quite contrary. Again, look to the context of the conversation when delineating between friendtastic an friendastic.

"Oh, sure, isn't <i>that</i> just friendastic"

and...

With a friendastic tone he said "No, I'd <i>love</i> to hear more about your poodles allergies"

Friendastic by Leelers June 5, 2009