Daughter wont leave strangers alone

My daughter who is.almost 5 is becoming way to friendly with people she does not know. I dont want to scare her from being social but its really hard for me. I am not a very social person. If.someone says Hi to her she will not.leave them alone. If we are at a park she wants complete strangers to push her on the swings. She forces people to talk to her and then shows them everytbing she owns. She fights to sit with people in public places. People she does not.know. is this normal social behavior?