By age 18, life is truly made easier if you have figured yourself out. Learned your weaknesses, so you can avoid their temptation. Learned your strengths, by being tested rather than letting Daddy's credit card bail you out. Discovered how much willpower you really have to do the work necessary to fulfill your wants--and learn what is really a "want", and what is actually a "need".
The more you truly know about yourself, the smaller the void is in your life. You know what that void is--its the black hole players try to fill up with multiple conquests. Its the black hole materials try to fill up with their buying sprees, fueled by the boredom with the last new thing they bought to feel better.
Its that black space that makes us afraid to love because we don't know what it is we have to give--or if we have the strength to give it away. Of course in reality, we never give it away--we only share it. So we can never lose what we share. We can just find someone better to share it with.
Learn what it is you have to give. You may not like everything you see in yourself, but you'll know what you don't need more of from other people. That'll help you in your decisions about your social and romantic life.
Learn what you can handle, and you'll know what decisions to make about your economic life. Move to that better job? Take a risk? Now you'll know what you can afford to lose, what you can rebuild or replace.