I am in the medical field and that looks more like bipolar disorder than ADHD. I have flooding of emotions at times but still know it is not okay to be abusive to another human being.
Please be careful guys like this can get pretty scary quickly. I think you should say goodbye for your own mental and emotional health. Breaking up will hurt but that heals. Emotional abuse takes years to recover from and can give yoh ptsd.
Good luck and stay safe