Six month tourist visa

Yes, you heard correctly - you can with an extension stay up to 180 days.  See these links:

https://medellinguru.com/tourist-visa/https://theunconventionalroute.com/exte … rist-visa/

The tourist permits are not actually visas.

Colombia is technically visa-free for turistas from North America, the U.K. and most other countries .. for a total of up to 180 days out of 365.

Dozens of cities in Colombia have offices of the Inmigración department, which supervises the 90-day extension process in those cities, at the national borders (some folks do a  double border-hop to Ecuador and back) and online.

cccmedia

All I can say is "una relación de lejos es feliz para cuatro"

And in your case with your "GF" there is nothing anyone could say that would be more applicable.

Hope you havent been  sending her "giros"..