Another freind problem?? lol?

well, my freind has recently criticsed me for hardly ever being sociable with her and how im allways quiet towards her in a way but to be honest, its because im kinda scared of her, whenever I talk to her, she doesnt treat me nicley and she's either upset or mad...she's also EXTREMELY loud and rowdy, she's also done loads of stuff i cant really talk about on here so i feel that there's a big distance between us ....everyone else seems to get on with her fine but I dont know why im like this...now there seems to be alot of awkwardness between us and we hardly talk now, i would talk to her more often but it seems she's changed so much! And I dont think i can talk to her about it....can anyone help? it would help make my life alot easier..thanks..