There are things that you don't need to apologize for.
1. Cutting off the people who are not good for you
You don't have to apologize when you finally react and decided to cut ties with the person who's toxic to you. You can't keep persons who keep on making you feel less. This is for the sake of your peace of mind. They won't be cut off if they're treating you right, they deserved it so don't be sorry.
2. Saying "NO"
You have the freedom to go along or not. You don't have to apologize for not wanting to do or say things you don't want to. It is meant to be respected.
3. Having Imperfections
You can say sorry for your mistakes but imperfections such as acne, stretch mars, eyebags, dark spots, and any other physical features are not for you to apologize for. It's your body, you're not hurting anyone with that. They're hurting you and you're tolerating them when you apologize for those. Another natural imperfections can be your voice when you can't sing or when you don't have the flexible body to dance. All imperfections that doesn't hurt anyone but you, those imperfections that naturally fallen on and in you...you don't need to say sorry for that. It is meant to be appreciated by the right persons and mostly you, yourself.
4. Asking your worth
You are not dramatic and pathetic. If you feel like asking for it then go ask. Those who genuinely love you won't find that a bother at all. You need assurance and security. You need that for yourself and for the relationships you have with people around you. Sometimes, we need words of affirmation.
5. Taking time for yourself
You might have lots of works to do, lots of problems to face, responsibilities to fulfill, pressures to bear....stop. Stop for a while, that's okay. Don't let yourself be overwhelmed. Take time for yourself once in a while. This is needed, you don't have to say sorry. It is your right. Take care of yourself.
6. Following your dreams
Others may go to different path. You don't need to say sorry if you wanna have your own. If you won't be swayed by their opinions, if you won't change your mind based on their preferences...there's no apology needed for those things.
7. Standing your ground and following your truth
It's in your own principles. It is you're character and manner you're holding. It must be respected, it's alright even if you're the only one standing for that. Take your dignity with you and don't apologize for that.
However some cases doesn't need apology but you voluntarily give it. Sometimes apologizing does not always mean you are wrong and the other person is right. This happens when you value your relationship more than your ego. But this is not healthy to do if you're the only one doing this in that relationship. It should be the both of you. Don't sacrifice your pride to someone who's okay to lose you for simple arguments.