You may be exhausted. Remember, you are not called to do everything. It's ok if you don't go to 30 graduation parties. Yes, there may be a few that you feel strongly about attending. Five parties is manageable but not 30. Create the boundaries you need to do well in this busy season. It is vital to create margins for yourself. You never know when something will come up that requires some extra emotional energy. If you have maintained some margins, you will have the reserves to manage it. If you haven't, things are likely to unravel. None of us wants that.
I have learned the hard way that I don't need to do everything to be a good mom, wife, daughter, friend or any other relationship. Enjoy life and prioritize what is important rather than what seems urgent.