So confused, I wish I had a blueprint on my life because I'm totally lost, help!!!!?

I'm with a guy who I been with off n on for 3 years. I haven't been totally happy for one he doesn't motivate me, I feel when in a relationship, motivation should be within both partners to be able to go forth, especially in tough times. Well I work, was in school failed my nursing course by 3 points luck me :(. I have my daughter, who is 3, I love her so much. But I know I am not doing my best n I can offer her so much more. I really just want happiness, I feel once I be happy everything else should fall in place. I'm not sure what I want my career to be anymore, I want to be a dentist n an rn still as well. But I'm grateful for what I do have that's positive but the negative out weighs the positive in my case. My indecisiveness plays a Hugh problem n caused so many problems. How do I get happiness n retain it? How do I get to where I wAnt to be in life? How do I succeed? How do I get rid of the bad n take in the good?