Hello Emma, what a lovely friend you are to seek advice for her ! Theres an old saying , You cant help those that wont help themselves , and sadly its true . Your friend simply must get to grips with her diabetes because unless she does , she is heading for serious complications . Its tough , some days its really tough to deny yourself some food stuff that you love BUT, the choice is yours, its in your own hands to either tow the line and make an effort, or be ill . I`m really sorry if this sounds harsh and blunt but thats the way it is . Your friend must know that what she is doing is wrong and that she is running a huge risk but until she faces it herself , there isnt much you can do except be there for her and let her know that you will help and support her all the way, if she put the effort in and I really hope she does .