Mint was a 4-letter word for me when I Lived in Calif. My mom gave me a small pot of it because I wanted it for iced tea. It grew like wildfire. It has long shoots (roots?) that run under ground and will take over everything else. It is hard to dig up because of those runners. Every time you think you've got it, it pops up somewhere else and you are back to trying to dig it out again.
I would recommend that you figure out how to contain it in a planter or container of some kind. It is lovely stuff if you don't let it get away from you.