It is not acceptable for your boyfriend to physically hurt you or dismiss your feelings when you express that his actions are causing you pain. Pinching someone out of anger or any other reason is not an appropriate way to express frustration or resolve conflicts in a healthy relationship.
His response to your complaints is concerning. It shows a lack of empathy and respect for your feelings and boundaries. By invalidating your emotions and claiming that pinching "doesn't hurt," he is disregarding your well-being and attempting to diminish the seriousness of his actions.
Whether he is ignorant or malicious, the behavior is still harmful and unacceptable. It's crucial to address this issue and set clear boundaries regarding what is acceptable in your relationship. Physical violence or any form of abuse is never justified, regardless of the reasons behind it.
You should prioritize your safety and emotional well-being. If you feel comfortable and safe doing so, have a serious conversation with your boyfriend about his actions and explain how they affect you. Let him know that physical violence is not tolerable, and you deserve to be treated with respect and care. If he is unwilling to acknowledge the problem and change his behavior, it may be necessary to consider seeking support from friends, family, or professional counselors and potentially reevaluate the future of the relationship. Remember, your safety and happiness are of the utmost importance.