Looking for travel buddies for weekend trips! (Barcelona)

Hi all!
I would like to start traveling more during the weekends (I work Monday-Friday) and i'm looking for some people to join me.
I prefer a backpacking type of travelling, low cost, staying at hostels, discovering local places, food and culture. I also really enjoy hiking and beeing outdoors, close to the nature. My idea is to basically look for cheap flights and go for spontanous trips ;)
I'm open-minded, flexible and positive and i'm looking for similar people to enjoy some nice places together ;)
I've been living in Spain for almost 2 years, but still didn't have a chance to discover any of the islands nor the north of the country...so maybe these could be ideas for first trips...
If anyone survived this long post and would be interested let me know!