how do i move on and find happiness ....

my boyfriend broke up with me of 4 years.. i’m depressed and cant even move, can’t even speak, Can’t even think, My heart hurts.. i wanna die.. He’s moved on he doesn’t love me anymore doesn’t care for me I do still but i need to move on and be happy. i wanted a family and marriage with this guy but he didn’t want none of that. im alone in all this i have no one to talk to . no family. im in a dark place in my life