Re: Q:how to go about "finding" in a dream someone I dreamt about last night?
That is a very interesting question. Dreaming is very mysterious. The best way to go about contacting him (do you know his name?) is to practice lucid dreaming, then when you become able to be awake and aware in your dream...call his name. Since it is your dream and are in total control...go to a phone book and look him up!
You might want to get a book on lucid dreaming. One way to practice is to meditate every night before falling asleep, and then remind yourself before you drop off that you want to become aware in your dream. Start journaling your dreams as well, when you wake up, so that they become an important focus in your life.
It is possible to have a great deal of control over your dreams, but it takes dedication and practice...and patience. Certain universities have done studies where people have trained themselves to go to sleep and then visit other people in other states, who are having conversations (in the waking state) and when they wake up, they are able to report exactly what was being said.
In the meantime, don't be sad about it - let it lift you up. This was a visit from the astral world, and not something you should try to hold on to. If it happens again, fine, but if not, there is someone out there who really loves you, and that is a truly wonderful thing...yes?