Why so Sudden

You made me feel in a cloud nine. You made me smile from the moment I woke up to the my most sweetest goodnight. Why? Have I done something wrong? I thought we're clear with what we have? I thought we can be friends? I know there is something behind it but I also know that we are aware that it  won't go to far. WHY? Why do you have to change abruptly??? I NEED AN EXPLANATION!!!!