My adventurer Friend.

'Hi bro, what’s going on?' He tapped on my shoulder, then I turned around and saw him. He was wearing a blue sky sky blue t-shirt with an inscription on it in which you could read with the strange message: “the truth still is out there”. He was in blue jeans and a kind of colour explosion in his sport shoes. His hair turned grey a long time ago and his green eyes which I always had remembered were bright and about to jump out of that charming face, seemed to withdraw tired into his eye caves.  But looking at that face as a whole, the wide smile and the truly (? adjective missing) forehead gave him the same friendly aspect appearance that he always has had.
I extended my hand towards him and, as if he wasn’t aware of that, he approached to me and gave me a strong hug, hitting my back with the palms of his hands, so hard that it made me cough for a while. As I was recovering my breath, he began to tell me, in a rushed way, all sort of stories about places, people and things he had done, jumping and waving at the same time, as if that would help me to imagine it. I stood there misunderstanding all that jam until he finished exhausted. ( sorry i don't know what exactly you are trying to say here?)
When the time to say good bye came, I could notice his tanned skin and the piercing in his ear. I stood standing there for a moment, meanwhile I went on staring at him walking towards a new adventure. Then I picked up my suitcase, ?stretched my suit? ( do you mean smoothed my suit or stretched my back?) and walked back to the boring hole from where I had came from out half an hour before, in order to have a break for lunch. Then I realized my sadness while I was thinking about how the chasing of the truth life would be like. - again not sure what you are getting at ??

maybe 'thinking about how life would be chasing the truth?'

Your english is really good to be able to write such a story! Well done