There is no value in regret.  Let it go and move on.  Focus on creating a life without regrets from here on out.  Live life fully.

Here are a few quotes to inspire you:

“When one door closes, another opens; but we often look so long and so regretfully upon the closed door that we do not see the one which has opened for us.”  ~ Alexander Graham Bell

“I never regret anything. Because every little detail of your life is what made you into who you are in the end.” ~ Drew Barrymore

“Forget regret, or life is yours to miss.” ~ Jonathan Larson

“I have no regrets in my life. I think that everything happens to you for a reason. The hard times that you go through build character, making you a much stronger person.” ~ Rita Mero

“Always Do Your Best. Your best is going to change from moment to moment; it will be different when you are healthy as opposed to sick. Under any circumstance, simply do your best, and you will avoid self-judgment, self-abuse and regret.” ~ Miguel Angel Ruiz

“There is nothing to regret – either for those who go or for those who are left behind” ~ Eleanor Roosevelt

“If we spend our time with regrets over yesterday, and worries over what might happen tomorrow, we have no today in which to live.” ~ Unknown