Suggest Remedy For Recurring Bouts Of Depression

I have suffered from depression in the past and I fell that it is reoccurring. I can just hide and mask it when others are around or even if I speak to a life skills coach she doesn t even see through my charade and says I am doing so well in life when really I am not. How long can or should I fool myself with this? I am fooling others, but not myself......why do I do this.