Don't tell him through e-mail! Wow. Please don't.
You're too far away from one another, you're both young - other people will come along. You don't want to start a relationship via. e-mail either. Wait until you see him again and if something happens - then it happens. But friendship is also a great thing, you know.
To love is to suffer. To avoid suffering, one must not love; but then one suffers from not loving. Therefore, to love is to suffer, not to love is to suffer, to suffer is to suffer. To be happy is to love; to be happy then is to suffer, but suffering makes one unhappy; therefore to be unhappy one must love or love to suffer or suffer from too much happiness. I hope you're getting this down.