I've stopped caring, is it normal?
I hope this is temporary, but basically I'm about to turn 23, and looking back to the start of my 20s I was a really caring person, suddenly full of compassion after coming out of my teens. This is in no means a way to suck my own proverbial dick, but I was really kind to others, or at least thought I was, I went on marches against things that were horrible and for things that were good, I gave loads of money to homeless people, donated to charity, worked for charity, went (and am still) vegan because I cared about animals and got genuinely upset at the thought of them suffering.
It's not like I don't do those things anymore, but it's more like a routine than something that moves me, because when I think about the suffering and what I can do to end it, it doesn't fill me with vigor, I just feel hollow.
I may be going through stress or had one too many friends who I've given my support even to the point of my detriment only for them to ask for more without any sign of actually wanting to get better, but, I think I've turned bitter. I don't want to be like that, I want to be kind and sweet like I used to be.
Maybe I just thought I used to be?
Is this normal and it'll just pass? Any advice?