Sometimes lives drift apart, distance reveals reality, and you realize you both were never really friends. It’s not like there is animosity and you wouldn’t call them an enemy. You just see it as it really is.
Maybe you always approached first, called first, texted first, or they only needed you for a season. That’s painful, but we shouldn’t be angry. On this side of things, it could just be over. We are allowed to say goodbye with love and loyalty remaining. God ordains all seasons under the sun, and this one slice of life has simply set.
If they need you again, be the one who calmly does what is needed. This is better than retaliation. If they reinsert themselves, give opportunities for trust without diving all in. If you both are friends again, celebrate: for life is short, and it is not good to be alone.