As others already have said (based on information you provided):
- you are not in a position to make this decision (yet)
If you become a pro now, very likely you'll end:
- with a
gambling debt
- without gf
The one point were you were really wrong:
- poker is gambling and can become addictive
On the chance of succeeding:
- only 10% poker players makes money
- my guess: <0.1% makes enough to stop working
- my guess: <0.001% becomes rich
So:
- study and get a regular job
- play poker for hobby
- study math/statistics (usefull for poker)
- if you are a winning player, your gf won't mind
- if you are really good (healthy poker income over several years), then talk again to your gf about becoming a pro