Sometime think it's amazing when you hear stories of people meeting up years later and still having that special spark. Sometimes however it isn't always cracked up as it is in the movies.
It all depends on the situation. Some people never even dated and they got together. One of them may have liked the other person but it was the wrong timing.
If it was the wrong timing then it is okay to give the other person a chance. If someone was really mean in the past then chances are they haven't changed. They could come off so nice now but once someone is mean they always will be mean.
Once again it all depends on the situation. Sometimes the spark never really eneded. Some people go years without each other and then they meet up and once again they are in love. Other times it takes time to start.
So if you happen to meet up with that special someone from years ago take things into perspective. Why did it not work before? Was it the wrong timing or was he immature? Think about your feelings and take things slow. You never know what could happen. Let life take you where it is supposed to go and believe it will take you to a wonderful place. Anything can happen.