I lost hopes for relationship and friendship

Especially in real world. I had a long term friend whom I liked alot but she kicked me out of her life after 7 years. Then I met someone she become a great friend and encouraged me to join this gym. We did join the gym and after that I am nothing to her. She doesn't even wants to talk or look at me. I mean how strange people can behave? I would welcome people who are honest and trustworthy. But in real life it's hard to find genuine people.