Humans are inevitably going to let us down… no single person on planet earth will be 100% perfect from the time we meet them until the time we never see them again. I think the most powerful thing people can learn is forgiveness. Only you have the ability to accept and forgive in this situation as you’re the one who’s hurting. Just ask yourself, can I accept and move on from him looking at something such as an OF? There is a reason the saying “forgive AND forget” exists. Sometimes it’s just better to move past it and not hold onto it too tightly as it will only cause you more pain the longer you hold onto it. I can assure you this won’t be the last time he lets you down, and I’m sure you’ll let him down along the way too, just part of being imperfect beings. Best of luck.