As @Izzy has said definitely still stick with it. Agree also that it's not so much a cliff hanger ending but they've given themselves some routes to go down should a 3rd series ever happen.
I pushed Love/Hate on Raj a lot, not as good as Kin and takes some patience to get through the cheap looking first 1 or 2 series but after that it's another very good Irish gang drama, give it a go if you haven't already.