Feel like my life is over so heartbroken

I'm 25 been with my partner 10 years we have Megan 8 yiannis 3 Nearly 4 and Jack due in 13 days n he's decided he's not happy wants to split up n leave everytime I try to talk to him I get f off d*ckhead baring in mind he is in my house my bedroom and said he won't leave til Friday I'm so upset been crying straight for last 3 hours