The state of being happy

So I spoke with my professsor last night so I could understand about being in the state of happiness. To reach this state you have to have acheived your goal in life and enjoy what you have choosen. So I won't be in the state of happiness until i am a nurse. It is hard to explain it took a whole half an hour for it to be explained to me. So now what shall I do? Shall I continue the fight to be a nurse? Shall I just wait til my youngest goes to kindergarden next year and then continue? I don't have any of those answers right now. I think I will just make it through this semester and then see. I hate waiting though. I want answrs like this yesterday!