Although they now really deplete your energy, you may feel guilty about moving on. They were so kind way back then and helped you out all the time, so perhaps you feel you owe them. But friendship has nothing to do with owing anything. It should be a joy, never a chore.
It’s important to focus and decide on who, among your circle, is an authentic friend rather than just an acquaintance. You can then concentrate on those connections. Life is too short to not make the most of your time together.