How do I get that spark back

I’m a broke 19 year old CS student. There was a point in my life where I was really delusional that a certain project would bring me real money - I spent 4 months coding it up, 6-8 hours every day just for it to never see the daylight. But during that period of time I was just so convinced of my project succeeding that I would wake up every day happy and excited to put the work in.

Unfortunately I haven’t had that feeling in a long time and I’m unable to figure out why I lost it. Hence I’m making this post - I want to ask for advice on how to get that purpose back in my life.