Whenever you make a decision, there will always be a risk that you regret that decision.

When I ask you to go somewhere, saying that it will be fun. You can say yes or no.
If you say no, you will never know how fun it can be, therefore you may not know what you missed out on and thus you might not regret that decision.

However, if you say yes, and you went and you find that it was not fun at all, you will regret that decision.

In conclusion, in most cases, it will be better to say no to something than to say yes.

I have made far too many decisions that I regret now. I am not going to do the same again. Please stop me with everything you can.