Um, so “why am I so indecisive?” The smarter you are, the more indecisive you become. That is the universal truth, at least I believe so. Since with more knowledge comes bigger possibilities. Then you end up overly thinking stuff you shouldn’t. Say, you are trying to impress people because you are “smart”, you end up more anxious about your decision to please everyone, trying hard to not appear dumb before them. It ends up becoming a trap for you. With knowledge, you can try trusting you gut feeling more. Look at gut feeling this way, see it as your subconscious decision that you make based on your long experience, making that decision works for you.
One problem with indecision is that you can’t blame anyone for it. Blame it on your gut instinct, and learn from it. Fear of shame is something that builds out of your experiences, wisdom helps you make the right choices; to gain that wisdom, you have to make all the wrong choices so that in the future you will always make the right one. Open up the possibilities, it’s not always just two choices, not going with those two decisions is also a decision in itself. If you are still in that decision-making hell, flip a coin and let luck decide it for you.