I only know it's a process of change of matter but I don't remember the exact types
Answer:
Chlamydia, They are the most common of STIs that can affect both men and women.
If they support your feet, are comfortable and if they fit.
Oncology is the study and treatment of cancer.
I would say that if she is being mean you can first try to talk it out with her (because relationships may take work sometimes and if she is really important both of you will be willing to put in the work), but if that doesn't go well and you really don't think it is going to work you should go to your other friends or family for support especially if she was a very important part of your life.