Yesterday, I had an argument with my girl, I yelled at her for the first time (8 months since we are together ), I don't know how to forgive myself?

all of my family and friends are tired of me because of my high blood pressure issues, I get angry on small things but never show it on her, yesterday for the first time I did, & made her cry 😖, I regret my actions so much. My most important goal in life is to make her happy. All I want is to make her feel safe and loved. After the argument I apologized her continuesly, told her everything what I had in my head, promised her with my life to never do anything like this again, she got calm, she's the most understanding woman I ever seen, my body was shaking after realizing what I did, I almost had an accident yesterday while driving, I just hate myself for yelling at her now. I don't know

Yesterday, I had an argument with my girl, I yelled at her for the first time (8 months since we are together ), I don't know how to forgive myself?
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