I think if you get a larger income, you'd be a lot happier if you don't overwork. I think a big priority would be to get a full(or part)-time job, and -since you have a device- make an eBay and aliexpress -and maybe even a ChinaVasion!- account to invest with. Just remember- buy, then sell for more than you bought it for. :-) Good luck!
P.S: Even more good luck getting that girl to be happier with you!