Because you are not trying hard enough

Things will not go like we plan them always but don't feel bad because some day you will remember this n say it was for good may be the things you want them to happen are going to get you hurt so just be comfortable with the things happening now and lead the flow

Cause you're a negative thinker and you attract negative things

Because you over analyze and over think like most of us. Just live without expecting!!!

Learn the concept of stoicism

Read the secret by Rhonda Bryne, it might help