My Spanish is decent. I feel like I can express myself well, but sometimes I don't understand a whole lot if the girl speaks really fast or has a non-standard accent. I can spend a day with a girl speaking Spanish and usually it goes smooth enough unless we go to a loud place.
You would be limited, but depending on your focus it could still be ok dating here in English. 2 of the girls I've talked to recently have great English. They are both well traveled, cultured, and have solid jobs. But they seem more like LTR girls. If you want to meet the type of gringo hunter girls that will quickly sleep with you, then they will probably have little English.
Flight booked to Medellín for 12/10 and I'm pretty stoked. The cold and rain is starting to wear on me here, 3 of my 4 apartments have been cold as **** and I don't like cold.
A couple pics from Monserrate with nice views of Bogotá since it's one of the few really cool things to do here: