I think you should be so proud of all the hard work you've done so far! Especially since you have been able to maintain such a great loss
I'm 24, 2 inches shorter then you and eat 2000 cal per day on average and am losing about 5lb a month. I do eat more lower carb though and I truly agree with the people who mentioned maybe checking that out. If you don't want to lower your calories you could always up your exercise. For myself, I just get famished if I try to eat below 1800 a day, so instead I work out 10-12 hours a week.
I hope you find something that works!