I'm on season three now.
I'm flying through this show as well.
Then I'm considering either re-watching Gossip Girl or catching up on Supernatural. Riverdale has gotten too dark for my taste. Not my kind of teen show. S1 was alright, but S2 got a whole lot darker. I just feel like watching 7th Heaven after an episode of Riverdale. lol One of the reasons I don't watch PLL. Creepy. xD