Relation is just like ice in winter! When it shines, it will melt-off.
Relations can be classified as three states; namely, 'In memory', 'Out of memory' and 'Away from Memory'.
All the current relations and friends are in the state of 'In memory'. It is like information being stored in the RAM of a computer, they are live and communicate frequently. We will have the effect of this type of relationship in our everyday life.
All our college and school friends are of type 'Out of memory' as they are not affecting our every-day life. But when oppurtunity comes, these relationships will turn back to 'In Memory' type.
'Out of Memory' type is the thrid one where we either not wish to have them in mind or there is nothing in common between. For example, when we travel regularly in a bus, the conductor is familiar to us but still they are out of our memory in the sense, there presence or absense will not affect our every-day life.
The only thing which differentiate all the three types is 'Communication'! Just 'Communication' makes them move from one type to another. There is a saying goes like, "Out of sight, out of mind!".
So Communicate! And be related!