Promises and adults

Some people do the actions, rather than just speaking and giving assurance to this and that. This such people are rare to keep as a friend.

Some people rather keep their mouth shut, rather do it on their own time. Their friends might not know what is the actual action they are doing until the final product is reveal in their eyes.

Some people do give promises and give assurance. But from the outcome, they do not do what they say but just telling this and that...but then it is not their fault.

Each time, I get fed up and exhausted whenver people get piss off on things they hide behind my back and assuming I got an telepathic mind to see through what they angry about. Well, at least the kids get angry, they do tell and resolve. But for adult, they dwell over it repeatly and keep in their heart and start to curse people.

Can I have a normal and mature relationship and communicate with my close friends. Now, I dont really understand why the anger and where moody comes from. What is cause of the problem happen this?