My husband cheated, i decided to give him another chance. am i right?

my husband cheated on me, about 6 months ago, he was suffering from depression at the time which is why i decided to give him another chance. he trying his best to fix things and earn my trust. problem is im struggling to get over it, im always angry at him, im bringing it up all the time, throwing it in his face, i can be so horrible to him and its making us both so miserable. will it get better with time or is it hopeless? sometimes i think i will never forgive him and i should have left when i found out. i love him very much and we have a son together. im just finding it all soooo hard and i dont know what to do anymore