Your are your 'selfish' years. It's a decade to immerse yourself in every single thing possible. Be selfish with your time and all the aspects of you. Tinker with shit, travel, explore, love a lot, love a little and never touch the ground.
Your gut feeling is always rite.don't doubt it or try to convince yourself otherwise because you just don't want that feeling to be true.you'll save yourself a lot of time and pain because when all is said and done you'll know your instinct was rite.