It is so challenging when you are about to tell the truth. Even if the truth can hurt the other, it is the best thing to do, to clean with anything you're holding on.
Because if you are not telling the truth as soon as possible it will make your relationship ruin because relationship are based on trust and honesty. If you keep hiding things from your significant other, it will just only make the truth sting so much more for other. Telling the truth as soon as possible will lessen the pain and make your partner more willing to work things out.
Because if you are not telling the truth you can't keep it hide and move on if you are still holding on. You just prolonging the process of healing if you are not telling the truth. If you are not being honest, there is no way to start the healing process. You and your partner need to figure out how to handle this situation in a way that benefits the both of you. Just be honest, it will work out for the both of you. If you remain hiding the truth, you will also remain angry because you will start blame yourself and become self-loathing. The guilt of keeping the secret from someone will start to go away at your mind and make you feel terrible inside. Telling the truth will be better not only for your partner, but also for yourself.