What kinda frame do i have please help

Affinity Cycles is a bike brand based in New York City. Looking through their list of what bikes they make it looks like the frame is probably the "Lo Pro" model.

These bikes aren't cheap so it is ... interesting that your friend didn't know anything about it.

It's a single speed bike, commonly known as a fixie. Affinity cycles makes expensive frames, I'd check to see if the frame came from a reputable and established source.