I am a firm believer that in order to be at peace with yourself and the world around you, you need to be forgiving. Forgiveness is the root of all healing.
Acceptance and forgiveness are two of the most important ideas in life. The first step is to accept that you cannot change certain things. For instance, you cannot make someone want you or love you unless they are willing. You cannot keep going back to the same things and expecting them to be different this time. People are living, changing beings. You are no longer the person that you were even just a second ago.
Forgiving people does not mean letting them back into your life. Once someone hurts you, you should always proceed with caution around them. Never let someone who can barely take responsibility for their own actions have power over you. They are not worth it and it will take a long time for them to mature enough to understand that relationships work both ways.
It is extremely important that you learn to accept and move on. You will find that in times of great emotional strife, the best solution is forgiveness. I have forgiven and I will continue to forgive so many people that did not apologize, and probably were unworthy of my forgiveness. But, think about it like this, how miserable did you feel when you were carrying all of that hate and anger with you?
The only thing that holding on to anger brings you is a high blood pressure. The world does not owe you an apology. You are not entitled to closure or answers. Although these may be nice, most things in life just do not work out. This is a fact that must be accepted.
Now, by acceptance I do not mean accepting defeat. If you fell into a pit and broke your ankle, you would still try to get out of this pit. There is no point in sitting and wallowing in your own sadness and self-pity because it will only harm you in the long run. Your ankle will not heal for six to eight weeks. If you wait that long to try to get out of the pit, you will starve to death. Do not starve to death. Heart break is the same way.
The day that you realize that you can do better in all aspects, the happier you will be. Forgiveness may be hard at first, but you will feel better afterward. It opens you up to a world of happier and more pleasant opportunities.
Forgiveness is a challenging concept especially if you are still upset about the situation. However, if you tell yourself every day that you forgive what ever harmed you even if you currently do not, it will eventually become a truth.