Why Me!

So hard...I am so devasted in the fact in how ppl can be so cruel.I know that ppl go through what I go through everyday and worst.I just dont understand how ppl can play with someones emotions and act like they don't care.I ask myself why?? Why?I tell myself that I am a very good person that has good values in life and basically a really good person.I have lived a very hard life and I think ppl feed off of that.I have been so out of it and so hard to let go.I don't even know how to start.It's so hard!!!Someone plz tell me how to start moving on and letting go..cause letting go is so hard!