In this life everyone (is needed) needs подходит больше to have a friend. This (necessity) need is born when we become aware of some parts of the world's life. When we are small and nobody wants to play with us, we feel (a loneliness) lonely, so we start (crying or tugging) мне кажется,лучше употребить annoying and shouting at somebody. These (is a) are the first (of the necessities) needs of people’s lifes.
Secondly, (after)when we (have a new contact of) лучше употребить meet someone, we feel (an) appetency and want to become (the) best friends (of) with (this) that person. Since (this) that moment, we think about (the) true friendship. (In our head the brains) We start to do an analysis about the qualities of the (best friendship) relationships in our head. (The) We want to give honesty, sincerity, self-devotion, generousity and receive it in return. (honesty, sincerity, self-devotion, generousity are our wishes, that we want to give-and-take). 
Thirdly, (the) true friendship makes us more careful and cautious towards others. The care, attention and love of close people (are giving for) give us more happiness and the communication becomes more mutual and (closely) closer between people 
In addition, we shall be interesting for (all) everyone. The good sense of humour not only makes (a) us laugh (us ,) but it is a way of (deciding) solving our problems (from difficult situations). (The faith in acquaintance)Возможно, вы имели в виду Trust is important in friendship because without (this) it we can lose the most valuable thing for us. 
Don't lose (something which) what you have!