I understand the fear of being vulnerable and letting people too close. However, I think in order for your outcomes to change something in your behavior may have to change. Easier said than done, especially if you are dealing with depression or anxiety (not sure what you are dealing with).

I agree with the above people who have said it would be helpful to tell your friend(s) how you feel. Sharing real feelings, which is really scary and hard, is the only way I know to build close relationships of any type. Maybe it would be easier to do it by text? And I agree with the above that just keeping it simple by saying how your feelings get hurt when they cancel on you to possibly avoid any defensiveness. Good luck to you.

I'm sorry you are going through a hard time, and also glad you are posting on here! I hope to hear more from you and hope your mood changes for the better.