Bye i love you!

My father leaves for work at nine at night sometimes. He yells "Bye! I love you have a good day tomorrow." to my mother, brother, and me. I run to my father with wet hair and Pj's on and give him a quick hug and on his way out i say to him "Bye!I love you drive safe". That is my normal response when he leaves. I've noticed how I say bye to my father and how differently others do it.One of my friends will just say"bye" or "later". It just feels so weird to me to just hear someone just say "bye",to me its like its unfinished.