What did i do wrong?

my friend never IMs or cals me anymore. when she does she IMS back but its very short. she says shes just very busy. anything else i say she says shes very busy. we had a small fight a coupe months ago but usualy its forgotten. i tell her i still want to be friends she says "of course" what does that mean? weve been friend almost 14 years youd think if she all of sudden hated me shed tell me. shes bipolar and obsesive compulsive i dunno if that has dsomethin to do with it or not. when i IM she IMs back when i talk she does back but never on her own and its always very short. what do i do? does she just hate me or what? iknow she has 2 jobs school and a boyfriend and she did before she IMD me then...what did i do wrong??