Shooting algorithm slows down as you get closer

I’m using LWJGL an am trying to implement mechanics for shooting. So far I got it working correctly, but I have it slowing down as the mouse get’s closer to the starting position. This is correct, but not what im looking for. How can I make the bullet shoot at a constant speed no matter how close to the initial position?

CODE: http://pastebin.java-gaming.org/065f082432f14