UPDATE: May 2 at 12:25 p.m. EDT
Against Me! have released an official statement on their website. Read it in full, below: 

From Andrew, James and Laura

I’ve left AM!. No drama here. I reached a point where I need to focus on other things. Respect to Laura and James. The last 10 years ruled. -Andrew
It’s been an honor and privilege to stand on stage with Andrew for the past 10 years. I am sad to see him go, but I wish nothing but the best for him moving forward. – James

It’s heartbreaking to know that Andrew won’t be standing next to me out on stage the next time I stand upon one.
I realize that at this point there’s a possibility that it may look pretty ridiculous to carry on playing under the name Against Me!
If I didn’t feel like I had something that I really needed to say with the album we’ve been working on for the past year then I’d humbly hang the hat and move on.

Andrew’s been a solid partner. Some of the best sleep I’ve ever gotten has been in the back of a 15 passenger van with him behind the wheel. He’s got a steady hand and has always been someone I’ve trusted. The definition of a good friend. I wish him all the best in his journey. -LJ”

ORIGINAL POST: May 2, 2013 – 12:02 P.M. EDT
Long time Against Me! bassist Andrew Seward has announced that he has left the band. “I reached a point where I need to focus on other things,” he said in a tweet, which you can read, below.