Any Suggestions.............?????????????

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I have an Ex with whom i broke up 2 years back.It was a mild break up where we decided to part away,no huge fighting and all. Now the thing is that neither me nor she has really commited to any one else in these two years,except for some short flinges. Now she suddenly has started talking with me and i get a felling she wants to come back in my life.I do like her but i think we are not made for each other. What should i do?/?/?