My daughter was wrongly diagnosed last year with ana but as a result now feels she has no idea of what normal eating is - if it's that bad for her after only a year it must be so much worse & harder for you. You need to accept that & realize that you're human & it will take time to re-learn what "normal" eating is & that you will make mistakes & that that is allright.
Remenber too that if you have a major problem with fats & carbs that you can get these from many sources - my daughter can't (due to irritable bowel syndrome which is what caused her weight loss & misdiagnosis!!) eat potato, rice, pasta, bread, milk, biscuits, etc etc etc but she gets plenty of carbs & dairy from pure natural yoghurt, the right cheeses (some she can't eat) & vegetables etc that do have carbs but which we don't think of as having them.
If carbs/fats etc upset you & cause you to worry about going backwards - it's not for ana or weight loss but for people whose systems can not take certain foods but might also help you.
Friends can also help but only if you let them & if you're moving out you do need to build up a support system. I also hope that you're not just studying - there are so many things to do & enjoy at uni - clubs & societies & so on - these things will also help you recover by giving you friends & interests & fun!!