[ad#link]It shouldn’t be that hard. The Aries man drops things quickly if they bore him, and is not one to dwell in the past. Aries is in the ever-present NOW, engaged with whatever inspires him at this moment. It is almost as if he has no history. So why should he hold on to grudges? Most likely, he will express a burst of anger (or even rage), and then just let it go.
If an Aries man has trouble forgiving, it could be that he has the Moon or Mars in fixed signs (especially Leo or Scorpio). Every man is complex, and his Sun expresses only one (albeit important) part of his personality.
Many Aries men have Mercury and/or Venus in Pisces, the most forgiving of signs. He might be a warrior-martyr, initially feeling irritated and then believing he deserved to be a victim of your errant behavior. Then you can forgive him!
Comment below: Have you had difficulty being forgiven by an Aries man?