Is it possible to be 100% honest in relation..?

In my opinion,we should 100%  honest in relationship in certain matter.If we be too honest maybe that make trouble to us.As example,when we tell our friend some secret that must be secret from anyone other than herself .After a moment,we heard that our friend tell every one. After that,with our couple we don't have too be honest.Because they are not confirm with us.So save that secret after they are confirm.Nowadays,some friend will stab our back without noticed.That maybe hurt ourselves and after that we will not believe anyone.So we just have to believe someone 50-50.That will make we safe and not hurt anyone especially ourselves.In other hand we have to be honest with our parent because they are more understanding than ourselves.Sometime,we will confuse myself.Why that trouble must be happen to us?? That why some of people commit suicide.That very sad ending..And i have read that when some people suicide at level 15.we will regret at level 10.So we have to think before tell someone and it is better we just tell to our parent.right??