I'm going to break up with my gf over blood donations.
What's the reason for breaking up with your gf over blood donations?
I don't want to harm myself to save her by giving blood for her.
You shouldn't break up with people over petty things. It could really upset the other person.
I'm going to do it anyway.
Giving blood is perfectly safe, so this is really a minor thing. Wanting to break up over it is overkill. Give blood for her as it will help her when she needs it one day.