sounds like your loyalty, which is a choice, comes with conditions....I will be loyal and YOU will be eternally grateful. we deal with other faulty humans...they WILL let us down at some point....no one can be dedicated to meeting our expectations at all times. we can become too attached to OUR loyalty, OUR good will.....and forget that others always have free will to act according to their own life's principals....
the only person that our resentments hurt is us. we can choose to hold them or release them. people don't do things TO us....we choose to take what they do personally.