An old friend; whom you miss

There's a person who happens to be an old friend of yours. Old friend in the sense that there was a time when you were very good friends; but then you had a fight and you are no longer friends. There are times when you remember the old times and feel sad that you miss those moments now. And if that friend happened to be a very close friend or more than just a friend then you miss those moments more. And if that friend happens to be of opposite sex then you miss the moments even more. And then when you spot that friend suddenly somewhere what do you do? You feel like going to that friend and ask "How are you? What's up lately?". And you have a lot of similar questions to ask. But you can't do that. Especially if you have been told to keep distance and not to interfere in their lives. So what do you do? There's nothing you can do. You carry on doing what you were doing; your mind goes back to the old days; you are covered with the memories; the past fills your mind; untill you shrug it off and move on.
Of course you can't do much about it. Or can you? You can go to the person and try to make things alright; try to make a new beginning; try to go back to the good old days. But would it help? The gaps that have been created - will they fill? The wounds that haven't healed yet - will they heal? Will the other person like to go back to the old days; or is that person better off without you? These are the questions that can't be answered easily. And whether it is worth the effort to find the answer is for an individual to decide.
You decide to move on because it is the only option. You make new friends, start afresh and march ahead. But why does the past keep comming back to you? Its got to be for some reason but you never know the reason. Maybe its because you still hope somewhere deep down inside that you could make a new beginning; or maybe you feel it was mistake you made and you need to pay for it; or maybe just because you still care.