It is in our nature that things that other people do affect us. Or so I thought until I started investigating deeper the reasons why do I feel the way I do in certain situations.

I found out that it is you yourself who is allowing those things to affect you, everything starts from yourself. Every feeling and affection that seems to come from somewhere else has its roots in yourself.

Now how do fix myself if I don't like the way I feel about something.

To do that you'll need to be able learn to control and see yourself, your emotions, feelings and understand from where they are coming from. After that you'll be able to observe the process as it works and see exactly what is going on with you.

To be able to control your feelings I think starts from observing your current feelings and what affects them and I think one big factor that is affecting how you feel about things is the importance and effort you devote into different things. 

Effort and importance two things that you can control pretty easily I think are the first step to conquer moving toward controlling yourself completely.

One good rule to remember is to not to give importance or waste effort on things that aren't relevant to your current state of being or situation.

Which brings us to the second point of the subject the situations. To be successful in a given situation some importance and effort are needed so how can you manage yourself if those turn against you?

The answer is situational sequencing and backseat perspective on the situation.

Firstly it is important to change your perspective to so called backseat perspective which allows wider and more objective approach to the situation. While you have this perspective activated plan is to sequence multiple instances of yourself parallel to each other into that situation to gather the overall information on what is going on in the situation. Which in turn allows you to act according to that information and allows managing yourself even when giving out importance and spending effort.