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.
The beginning of love is to let those we love be perfectly themselves, and not to twist them to fit our own image. Otherwise we love only the reflection of ourselves we find in them. (Thomas Merton: No Man Is An Island)