How to stop caring?

Long story short my life is going to shit and everyone is treating me badly and also my S. Os friends are not saying things to my face but talking shit about me but only when my S. O isn't around because he loves me back and yelled at them when they were talking shit about me so now they only do it when he's not there to hear, but basically they all are being two faced with me and him because before we all were very close but now they all are being weird with me and him and Basically it feels like everyone is against me in some way or another and at first I didn't care but now things are getting worse and I haven't even done anything wrong to anyone I've been to myself and minding my business but now everyone is treating me a lot more mean and I just don't know what to do anymore because I love all of them and seen them all as close friends to me because we were all close before and now I just don't know anymore and it hurts a lot because I actually genuinely cared about everyone and for them to do things like this to me out of nowhere hurts a lot, feels like someone ripped my heart out.

How to stop caring?
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