@Confusedgirlx3,
You need to get out. He needs to grow up.
You are right that you are missing out on the world.
I suggest the two of you take a break. And I mean a real break, not calling every single day. You have been joined at the hip during your formative years, and this seems to happen in situations like yours. Someone, inevitably, turns dissatisfied.
In the meantime, he also needs to learn how to be adult and responsible, which means working, saving money, and doing adult things like paying bills and making sure the place is clean, and perhaps furthering his education in order to improve his future.
You need not be broken up forever. And you exploring the world does not automatically turn you sluttish. But if you kissed another man or even slept with him, or went to Paris or LA and decided you preferred it there, or you were inspired by the paintings at the Prado or the National Gallery and decided to chuck your current job and become an artist, the world would not end.