You get hurt only by people who occupy a big part of your heart. The more it hurts, the more important the person. Why it doesn't matter to those who hurt you I will never understand, especially when you know you occupied a big part of their heart too.
Never trust a person who has let you down more than 2 times. Once was a warning, twice was a lesson and 3 times is simply taking advantage. Gotta remember this! Why waste time with a person who isn't a.friend at all?