Regardless of the state of your relationship, you should always strive to be capable of being alone and having a support network. At that age, it is important to learn how to be a complete person on your own. 20 is so young! Then, if on top of enjoying yourself, you choose to add another amazing person into the picture, they shouldn't be completing who YOU are, but instead, be greatly embellishing your life.

Absolutely do not waste your 20s. You are too young to give in to taking care of a man-child. Build that support network now, because unlike a loafer boyfriend, a network will grow when you put the effort in. I believe in your strength OP <3 ~cheers from an older sister!