Christmas tree I'm not good today can't cope

I've been on here and told my story but I'm really hurting bad I'm in the UK and it's 5 pm I've been in bed all day unable to get up can't stop the tears today and I don't know how I'm going to feel ok and get through this horrible festive period my so called Friends have disappeared and don't get me thinking I should have moved on from my narc just now and just don't understand ! For those that don't know my story 10 years with narc he went with another woman got in touch in sept had sex with me told me he was seeing someone then went silent ever since and blocked me !
Last night I know i shouldn't but the smug evil other woman (she's a murderer) has now posted her mobile uplands on Facebook on public view and posted a bloody picture of her Xmas tree when she's with him and she puts on it is it Xmas yet feeling festive and he helped her decorate it never in 10 years has he done anything vaguely helpful to help me or any other woman yet there he is with her decorating her bloody tree what also struck me was there was only 7 shitty looking presents under it no gift tag or bow yet me i always made effort tags ribbon bows etc made nice meals looked nice he was catered for sexually massages too now he's with this evil woman that doesn't Give a shit it's been 6 months he's taken her everywhere included her so when is his mask going to fall and see some narc treatment cause he's still being the perfect guy to her has he changed cause it looks like it I feel as if I've bee stabbed she has my life I can't stop crying I'm on anti depressants which don't seem to be working and I can't cope family don't get me and aren't talking to me all I have are you people please help me I can't book one to one with goldie until new year due to finances so please someone tell me why he's being so nice for 6 months to her should he not have dropped the act by now as I'm a broken mess and also I thought he was with her for money but looking at shitty presents and how little effort she goes to I doubt it and she's older than him and killed someone so why the hell is the appeal I've been his longest 10 years any other women has 4 months maximum but this one sticks to him like glue she's going no where and she's taking great delight rubbing my face in their happiness I had to put my phone away last night to avoid contacting her telling her what he's done with me and he's on dating sites I need someone to help me Saturday night and I've not even made it out bed I have no life and no motivation and I don't care if I'm not here anymore tired of trying to just get shat upon