I believe love does not stop; however, caring for someone can. Sometimes we put too much time and energy into people who do not appreciate it or reciprocate it. Some people push and push until we have to give in and acknowledge we can love that person but we cannot continue to revolve our world Round him/her.
They say that ...when you find yourself, try to become a better person all your shitty friend ...well, they will be gone. God will not allow you to work on you, let you get better and heal and keep bad friends that influence you the wrong way. that is not going to happen.