Guess the name of musician

I have loved. I have lost and I have changed. It has been difficult but I have learned so much from it. I have learned that people can hurt you so deeply and not even worry about you. I learned that good people can change in a minute when their hearts have been broken. I've met great people, but mean people as well. But the most important thing I have learned is that every person in this world is strong enough to let go . People come and go and that’s life ! The most important thing is to stand up and realize that you deserve something better than a person that gives up on you.