Sometimes it's hard to make a decision because your choices aren't easy. Options aren't always black and white, and there will always be negatives and positives about any possible given outcome. You're not expected to make the perfect choice, or even the right one, at every opportunity. In the future there will be days when you will think you made the right decision, and there will be days you are sure you made the wrong choice. What is important is that you can look yourself in the mirror and be content with who you are and confident that your decision will, if not now then eventually, help you grow in the direction you want to. Think of the direction you want to grow in and choose the choice that moves you in that way. And then try not to dwell on it. It's over. The end.
*this post was more for me than you, but I hope this helps you too :)