Is there an end to Stardew Valley? Like an end cut-scene or end items? I've pretty much finished everything and was just wondering if there's a end.
Stardew Valley has no official end to it. You can keep playing for as long as you like.
The closest thing the game has to an ending is getting a perfect evaluation by your grandfather. At the beginning of year 3, your grandfather's ghost will appear and score you based on a multitude of categories. If you get a perfect score, he will award you a statue that gives you free Iridium every day. If you've acquired this statue, it's safe to say you've 'beaten' the game, outside of any achievements or personal challenges you wish to work towards.
As of patch 1.5, there is an ending of sorts. You need to reach 100% Perfection in the Qi Walnut room, then unlock the summit. There's a cutscene that is basically an ending. The game keeps on going even after that (and you get a cool item for your troubles).