Everything had changed

Everything has been changed since her father passed away. Dunno y when i always look at her, no matter from far away or near distance, i also wil feel that she is pretend to be nothing at all, pretend to be happy. I feel sad and heart pain for her. After her dad passed away, we seldom hang out together and talk together. If for last time, she will tell everything to me, no matter is a happy things or sad things. Whenever she have anything, she just will tell everything to me. But now, seem that she no longer need me anymore. Nowadays, we hardly find free time to chat to each others. Everytimes when i wish to talk to her, she will just avoid me or she is with her group of friends. Sometimes i will pretend to meet her "accidently", just to say hi to her or just pretend to walk by pass her to c whether have chance to talk with her or whether she will start a conversation with me 1st or not. Quite silly rite? Nowadays when we talk, the feeling edi not the same, not like best fren chatting on, is like a very very normal fren just greeting to each other or ask each other "how r u". I feel funny because ask her that question because usually we always c each other everyday, but still gonna ask her how r u. When i tell this to my frens, they will laugh abt it and always told me that give her sometimes. She need time to adjust back to normal. When everything done, she will back to me like normal. I really dun understand, when i ask her for a lunch or dinner, everytimes she will find reason such as tired or no time to reject it. But when her frens ask her go for a dinner she will just accept it. What's wrong? Its already 2 months. I really dun understand wat is going on rite now. I just wish to back to the time that i n her still always hang out around n also when anything happen, she still will find me to talk abt it. But i know, rite now, it is impossible!