I guess u need to treat her better... Most guys try hard to get the girl they want at first.. buy the flowers, chocolates, bring them on date, walks at night and etc.. but once they get together for a year or 2 they stop doing all these small but vr sweat and very meaningful to girls stuff..

remember to buy them once in awhile, small inexpensive trinkets like decorative stuff or if ur rich and buy expensive stuff.

Then once in awhile bring her out for a nice meal, not with frens like always but just the 2 of you.

Oh and anniversaries are important.. answer wrongly during one of her interrogation on the dates and your in big trouble..

so the bottom line is whether your are rich or poor, tending to your partner's heart is vital.. she might feel insecure not because of your low paying job but might be because of your lack of attention towards her... hence she hangs out with other guys for it..

Yeah.. the best is to find gf who dont depend 100% on you.. Independent ones are the best where they dun need you to buy stuff for them...or pay for them..they are ones who prefer to split the bill..

luckly im blessed ^^