He broke your heart, I understand.
It feels that your heart is shattered right now and that's an understatement. It doesn't happen all in an instant; not like taking off a bandage. It's more like a gradual cracking of glass; the more you think about what happened, the more dreadful realizations you arrive at. And everything just starts to slowly break and fall, shock after shock, into tiny shards and fragments that seem impossible to glue back together again.
You feel that you can't trust anyone anymore; not like that anyway. So you put your guards up, high and wide, and let no one come near; at least not near enough to cause another terrible mess.
It's a shame, dear, to enclose yourself in such limiting barriers. You've got so much to give and so much to share with the world. You're here for a reason and we might not know it now but I'm quite sure that it's not to hide away from every horrible guy and their deceitful games.
I admit, our world is so full of pain and chaos but you've got to know that there's more to it than that. You can't lose hope. You can't keep questioning every nice guy you meet and wonder in what innovative way can he hurt you if given the chance. You can't possibly believe that you can completely avoid sorrow and madness; believe me, I've tried. Darkness is inevitable but that doesn't mean that the light won't shine and save you again. In this world, there's also all sorts of kindness, laughter, excitement and other amazing and exhilarating things happening that you don't want to miss out on.
And you know what, you're strong. You're going to survive this heartache and the next one and all the other wretchedness the world's going to throw at you because you've got a brave soul.
Have hope, dear. You've got this. Give this world another chance.