radiator leak

I've been trying to track down a slow coolant leak for the past 2 months, and today I finally saw a spot on the driveway. It looks like the leak is coming from the radiator. I can see an active drip from the drivers side lower corner of it (image below). My question is, for a driveway repair...

So I have noticed within the last year, that my coolant was getting below min about every 6-8 weeks I couldn't figure out where it was leaking from until yesterday. Its right at the top of the RAD (driver side). No puddles or spots ever on the floor, just a a bit of a coolant smell after...