Eh. Physically it pretty much is an arrow. Things might feel the same but being literally the exact same doesn't seem supported. Even given infinite time that doesn't mean the exact same things will occur, there are after all an infinite amount of different possibilities, you won't exhaust them and need to repeat.

With respect to how we experience things you can certainly talk about repeating cycles, but a sine wave feels like a more appropriate comparison. A lot of this sameness seems subjective in nature, how we interpret events.