I think you've answered your own question by asking this question! We are taught that "One who seeks advice, increases understanding" (Pirkei Avot 2:8). Asking "the rabbi" or asking a parent or a friend is probably the best way to add information and perspective. And the more advice one receives, the greater one's wisdom.
Of course, the final decision is yours, and it's your right to decide X even if everyone else advises Y. I suggest you make a list of pros and cons for the decision, and include your thoughts as well as those you heard from others and sound reasonable to you. Then maybe say a little prayer and decide and hope for the best.
I don't know of any magical formula for always making the correct decision. Often one needs to make a bad decision in order to truly understand what the correct one is. And there's always an uncertainty factor that can make the "smartest" decision a disaster, as seen in the following story I heard from a teacher who said he heard it first-hand.
A billionaire sought to live in the most perfect place in the world. The place with the best weather, lowest crime rate, lowest taxes and many more factors. He hired a renowned research team to find this place and spared no cost. After intense research they told him the name of a place and he moved there. Guess what? It was the Falkland Islands three weeks before the war broke out.
I wish you much success!
