Experience.... o_O

I really wonder why people suddenly change. 1 day they're sweet, the next day they're not. 1 day they're here, the next day they're not. 1 day you're important, the next day you're worthless. 1 day they say i love, the next day they say who are you? 
That's how ironic things and people can be. You choose to get hurt when you choose to be in love...