Feelings are based on your perception of the truth...not truth itself. Now, there are times when your perception is the truth and your feelings are valid but there are also times when how you feel is far from from the truth. Here's an example: someone doesn't speak to you and you get mad because you "feel" like they were being fake or shady when the truth is that they just didn't see you. Your feelings were the result of your flawed perception. See how feelings can be so misleading?
Furthermore, our truth is not always God's truth. Your feelings about a situation can be valid and your actions justified according to the world's standards but God's word says forgive those who hurt you, love your enemies, turn the other cheek, etc... This is why we as believers must be led by the spirit of God! How much better would our lives be if we truly were guided by the word of God? I'm certain that we would make better choices in our relationships, how we parent our children, our finances, what we say, and even what we post on social media...lol.
So umm, about that decision you were about to make out of anger, hurt, or disappointment...what did God say? Did you ask him? Did you open your bible? Probably not. Never make permanent decisions on temporary feelings. Feel what you feel but also pray and seek God's guidance. God doesn't just want us to seek him after the fact. He wants to be included from the start. Believe it or not, God is concerned with the quality of our lives. Our faith must supersede our feelings and we must be led by the word of God.
"Man shall not live on bread alone, but on every word that comes from the mouth of God.” -Matthew 4:4
Be blessed :)