Thinking thoughts... What to do?

You know those people that come into your life, stay awhile, and then get up and walk out? You adjust your life because they have left and you learn to live without them and you create your own happiness. You get all settled and you become happy when all you have been was sad for the longest time. You are eventually fine.
What happens when those people come back into your life and want to be friends again? Do you just set everything aside and let them back in? Do you risk getting your heart broken again? Do you just simply take the chance and if they mess up again, its their fault? Either way you might lose and there is a possibility that you may just end up looking like a fool. The person can change and be the greatest ever, but you still remember all the bad things that have happened. You just can't seem to find the strength inside of yourself to let all those things go. You have no clue what to do and you are once again confused.
The person has called and called and asked for more chances. You have said that you will think about it and have an answer for them when you get to it. All of a sudden, the person stops calling and you wonder, do they even care anymore or are they just busy? One may never know but if you can't be there as a friend, it seems difficult to understand why they would ever be anything more than that. You are ultimately left with the choice. It may sound like a simple yes or no question. It goes much, much deeper than that. It deals with the way you feel about that person in your heart. It also depends are whether you are willing to fall apart all over again just to give this person one more chance. In the end, you are the only one who can make this choice for you. Not your friends, your parents, the person, it is all left up to you to decide where your life goes and where you end up. It's all up to you. That's why everyone says, "life is all about your choices."