What did Siddhartha really meant by ending suffering I constantly hear from buddhists that "happiness is inside of you" and that thinking you can get away from suffering by wanting to be somewhere else, or wanting to be with someone else or stuff like that, stuff that comes from the outside, is only misleading and will generate more suffering because once you satisfy some particular need, since you are a human being, other needs will arrive and with that new forms of suffering, but then I wonder, how is it possible to end suffering if we will always desire for certain things, as long as we exist in this material world? Can someone clarify  this to me? I'm really naive into buddhism
"Ending suffering" is a red haring caused by older translations of the Pali word Dukkha. 

It is a word which has not survived in Western Indo-European languages, but its antonym "Sukkha" is the root for our word "Sugar" in English, "Sucre" in French and "Zucker" in German, all meaning "sweet".

Later translators preferred to either leave the term untranslated or to clarify that translation with terms such as anxiety, distress, frustration, unease, unsatisfactoriness, etc. Many contemporary teachers, scholars, and translators have used the term "unsatisfactoriness" to emphasize the subtlest aspects of dukkha. 

Buddhism focuses on developing insight into the nature of dukkha, the conditions that cause it, and how it connects &amp; affects us all. This insight, bodhi is (also dubiously) translated as enlightenment. So what Siddharta actually meant would be closer to "ending the arising &amp; conditions of unsatisfactoriness in one's mind", which also creates positive effects in reality (by actions based on understanding) and therefore to others.