After hitting play, launcher opens "Game Output" and does nothing else.

Every time i open the launcher and hit play, it closes the launcher briefly and re-opens it i another tab labeled "Game Output" which contains:

[23:54:04] [Client thread/INFO]: Setting user: camshaner6
[23:54:06] [Client thread/INFO]: LWJGL Version: 2.9.4

and minecraft doesn't launch whatsoever.
I have tried uninstalling from the launcher set-up, deleting .minecraft, reinstalling clean, and nothing works.

What I expected to happen was...:
The game would actually launch after hitting play.

What actually happened was...:
Another launcher tab labelled "Game Output" opened.

Steps to Reproduce:
1.) Open Launcher
2.) Press "Play"