Hello
Firstly I hope you and your family are all well and i am glad your Mum is recovering, that in itself is a blessing.
If i were in your shoes i would also be feeling the same way and i must admit that i would be moving away from those friendships but not in a direct way, i would just remove all the hard work and effort you put into those friendships, sit back and wait to see how they respond and to see if they contact you. I did this recently by removing myself from Facebook, most of my friends said “friendship doesn’t need social media of course we’ll stay in touch” they never have!
meanwhile i have been spending my time making other friendships, not close ones as i no longer believe that modern society has time for the “sex in the city” type friendships or maybe i’m just too cautious.
I do believe that not everyone is meant to stay in your life permanently though, that some just pass through, it hurts in the short term but your worth alot more than how they are treating you.