Not always. If a child was surrounded by a good role model (adult), then yes, they would learn how to act against conflicts. If the child was surrounded by someone (an adult) who failed the conflict, then it could lead to the young child copying them and resulting in a bad situation.
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.
The River Thames is the river that runs through Southern England which includes London, and eventually empties into the North Sea. It is actually the longest river all over England and is the second longest in all of United Kingdom. The largest is River Severn. River Thames also flows alongside towns and cities like Oxford, Reading, Henley-on Thames and Windsor.