Is it okay/ normal to still feel deeply hurt a year after being cheated on ? Still together.

Leaving is not an option for a reason . I don't want to get into detail, but just wondering if it's normal to still be feeling this way so long after . has anyone else felt this way, did it get better ? Does anything make it better or make you forget? The thoughts of it all just always seem to creep up on me. I feel like it truly changed a part of me .