Parents do change and sometimes they feel that the only other people that will understand the situation are there kids. My Mom always used to talk to me about stuff. Not always deeply personal but important to her. When my Dad went through MLC he started to have long talks with me too.
I felt as if I was their sounding board. I just offered them support, ran off on my own holiday to denmark for 5 weeks and nearly forgot the stress that was brewing back home. It all worked itself out about a month or so later. Again, I think she just wanted support by me listening to them. So no need to choose sides, let them know you love them both. Things may be changing hormonally for your Mom. Hang in there.
As for your friend, perhaps she is becoming toxic to your positive frame of mind? If it gets to be too much, don't seek her out and see if you can feel the difference. have an awesome night tonight. Let us know how it goes.
hugs, kat
Me-53(and learning!) S24, S21, D18, D17 Just keep swimming, Just keep swimming. Dory