Hi to everybody please help me What do we call a person who helps addicts to give up using drugs.I mean what sort of counselor he  could be called?

Hi to everybody please help me What do we call a person who helps addicts to give up using drugs.I mean what sort of counselor he  could be called?

Hi to everybody please help me What do we call a person who help addicts to give up using drugs.I mean what sort or counselor he  could be called? 

I can't make another account. the site always ask me the following quastion : what does Englishclub help you learn.please help me how can answer tis quastion.let me add that i try a lot of grammatical and correct sentences.Thank to everybody.

could someone tells me what's the diffrent between these two sentences when we use them in isolate means in single sentence?

I will come.

or

I would come.