Emotion is natural. Anger, sadness, grief, all of it. Yet many of us grew up believing that emotion was weakness. That we needed to hide what we were feeling.
Emotion is part of being human. It doesn’t make you “weak” or “sensitive”. It shows that you are not afraid of your feelings.
Don’t ever apologize for something that is simply natural. You should never feel like you can’t express yourself. Keeping everything bottled up will only lead to misery.
Cry when your heart breaks, scream into your pillow when your angry, and take your time grieving. Don’t think about who may be judging you. At the end of the day you have to be able to live with yourself.