More often than not, people get upset or disappointed when they've been let down. A let down can happen because an expectation wasn't met, a promise wasn't kept, or simply because no effort was put forth at all.
When someone vows to try to do something for you, appreciate it for what it is...effort. Trying doesn't mean anything is promised or sure to happen except effort. You know too well how it feels to hope for something only to be hurt or disappointed. Don't hurt or disappoint yourself by hoping for far more than the effort to which someone may avow themselves.
Continue to hope and wish for everything. The sky is the limit. Simply set a boundary for your disappointing experiences by knowing when not to hope beyond someone else's abilities or word. A small effort is better than no effort at all.
It's beautiful to be you...simply beautiful.