My girlfriend often blackmails me. Do you want to get used to it?

I think your girlfriend always blackmails you. Do you want to spoil him? This is your own business. If you find it interesting and you like it, you can let him do it, but if you think so. You are cruel. If you don't want to tolerate it and feel particularly bored and tired, then tell him not to let him do it. If he does this again, you may break up with him.