Time Machine!

I wish I could go back in time, to the time I didn't know you. Cause those times, were a lot easier.

Yeah, things really changed a lot since the day I knew you. Weird human feelings started to pop up.

Enemies become friends and friends turn into enemies. Some good people doing bad things and some bad people doing good things.

Which one are you in? I really don't know. Sometimes you are cold while sometimes you are cheerful.

You change just like the temperature. Both hot and cold. In the end, I just can't figure you out!