How do you know if your life is fulfilling, money doesn't necessarily bring happiness, but what does?

No money does not bring fulfillment but it sure as hell helps, id rather be comfortable financially and then look to other sources for fulfillment than be struggling with debts and not be able to pursue other means of pleasure. Real fulfillment comes from relationships with others, a broad mind, and seeing more of the world. As your so young still why not take a career break and travel the world for a year while you have no commitments, I did it at 21, travelled all over south east Asia, Australia and the States, id never swap those experiences for anything and sure does broaden the mind, you have years to settle down and find love etc, if you make the most of your youth (which passes very quickly) you will feel you have achieved more and be ready for other fulfillment's when you get older. Each person is different but id grab life by the horns while your only 20 and not waste a moment of your Precious youth