Well I was finally able to launch the game flawlessly by updating everything to 1.7.10
However, I have run into a new problem. When I am in-game any key I press opens up the inventory and I can't exit out of it. If I press the escape key it will instantly pop back up the moment I unpress it.
Any ideas on what is causing this? A nei mod?
EDIT: NotEnoughKeys was causing the issue.