Live with your choice.  That is what life is all about.  If you feel like you need additional time to kick yourself in the butt, do so.  Learn to express your regret, write it if you cannot speak to anyone about it.\nYou do not have to go through this alone.  Pay attention to those around you and you can find help.\nTime will pass.  This is not the end of the world, it just may seem that way now.
How do you find the will to live when all you can feel is regrets and emptiness inside?