The past explains how you got to where you are now. But where you go from here is entirely your responsibility. The choice is yours. Like a broken record, you can keep on playing the same old tunes of the past; re-living past injustices; feeling sorry for yourself for past mistakes; all of which just keeps re-affirming and programming failure patterns and negative feelings which colour your present and your future.
Or, if you choose to, you can put on a new record to affirm and re-programme yourself with success patterns that’ll give you a good, positive attitude which will help you do better here in the present as well as put you on the right path for an enjoyable future.
A simple place to start is to make yourself a gratitude list. Make a list of, say, around 5 things that you are really grateful for. Not things that you feel you should be grateful for. Ideally make this list last thing at night and first thing in the morning. Also, ask yourself two questions; 1) What have I done well? 2) What is do I like about me? Put this on a post it and stick it on your bathroom mirror so that every time you brush your teeth, wash your hands etc., you will see it.
We can only grow as big as our thoughts. We are defined by our thoughts. We are the result of what we constantly think about all day long. What you think about most is what you are likely to become.
Stay positive and take responsibility for your own world and never project blame. If you do, you lose your personal power.
And smile a lot. 
Paul.
