Here is my experience, can anyone help me to understand?

[OutOfThePrison]

In one of my dreams I realised that I'm on a dream. Suddenly I remembered that you can go anywhere on the astral with your wish and I wanted to visit one of my dead relatives. I wished it and suddenly I started float upwards fastly(It became spontaneously) , it was just like I'm flying up on the space or somethig like that. The floating continued for a while and when I stopped I heard my dead relative's sound so clearly and loud. Maby we have a conversation with 2 or 3 sentences and then the experience finished and I woked up.

I read somewhere that it is so hard to communicate with dead person on the astral or maby it can be non-verbal, but on my experience I heard my relative's sound so clearly and loudly.

Is this a fake thing that my subconscious mind created it? How can I be sure of it?

[Xanth]

Is this a fake thing that my subconscious mind created it? How can I be sure of it?

You can't be sure really.
Use your own judgment. 

Think about what was said, and whether it would be something that particular person would have said in real life.

[OutOfThePrison]

She said she loves me a lot(few times). I said I love you too where are you what are you doing, are you well? Then she said something about the real life which I searched to find a connection and I found from a indirect subject but I'm not sure..

I know this is my own experience, but I have the pain of my dead relative and it's eating me. Only OBE meditation helps me.

[CFTraveler]

I am of the opinion that when you project you can go to your dear passed one, more than they can come to you, and that it is more 'genuine' in conscious projection than in dreams, because in dreams your subconscious often is in charge, and can create the experience.
Only time and experience will tell if it's a 'genuine' visitation, as there are ways to ascertain the 'truth' of your experience, and only you will be able to tell what is and isn't genuine.

[Gavin]

If their essence had a truly powerful impact on your life, part of them must exist inside of you, as part of your being and soul. If you draw upon that part of you they left in your heart, what does it matter whether it is their real spirit or not? It's what they left inside you and it's speaking to you from a place of love. Try not to question it. Embrace it, and you will receive the answers you seek, perhaps not in words, but in warm positive feelings.

When we are gone from the material world what better than to leave an imprint of our essence inside a loved ones soul?

[OutOfThePrison]

If their essence had a truly powerful impact on your life, part of them must exist inside of you, as part of your being and soul. If you draw upon that part of you they left in your heart, what does it matter whether it is their real spirit or not? It's what they left inside you and it's speaking to you from a place of love. Try not to question it. Embrace it, and you will receive the answers you seek, perhaps not in words, but in warm positive feelings.

When we are gone from the material world what better than to leave an imprint of our essence inside a loved ones soul?

You're absolutely right Dear Gavin, the "love" of my experience warms up my soul. The only truth is what we experience clear and deeply, so what can be more real than the deep "love" feeling?