Holding grudges

Does friendships count as love? Well anyway, my friend closest friend (whom is a girl) and I recently started talking again. I had to stop for a while because college was becoming too much and she understood that. Anyways, she tells me everything and shes one of those people that if they get angry, she starts telling all your business (a reason I don't share everything). Well she has this group of very childish friends who literally would hang out at walmart (i guess they like that store) and one of them is a girl (D) and her and my friend (Y) got into it arguing really badly and she kept throwing my name in it saying she would never invite her places and always me (note that i would be the one invited to come hang with D and my friend). Anyways they always do this to her, act like everything is her fault even though shes the one who stopped talking to my friend for 6 months and blames me even though i was only kind. We all literally sat together crying about our feelings. She acts like my friend always has to be the problem solver and I keep telling her no you don't. But they seem to have made up recently. I don't know how to feel, i thought when your best friend dislikes someone its automatic that you do. But honestly, i just want to mind my business and tell her not to share hers. May i please have some advice.