One CRAZZZY Night!!

so last night my parents went to dinner with their friends and they wanted me to babysit my sisters but i wanted to go to my boyfriends house and since tyler [my boyfriend] has sisters around my sisters age i decided to bring them with me. so we were there having fun swimming, having a bonfire, and watching movies until tyler had to take us home because it was 11:00pm. my parents still werent home and they werent going to be for another 4 hours. When we walked in ALL THE LIGHTS WERE ON! and to make matters worse THE SLIDING GLASS DOOR WAS OPEN! What does that mean? It means some creeper broke into my house last night....but they didnt take anything.....I wonder if he left........he could still be in my house [hiding] waiting to [kill] me........my life is in grave danger.....pray for me!