How do I get over someone ?

I have been with my boyfriend 4 years , we have a 2 year old together . And though things have been bumpy before we always choose to make it work but this time it doesn’t seem there’s a fix to it . He told me he isn’t to sure he’s still in love with me & feels nothing when he looks at me . It hurts like hell because i never imagined not growing old with him . And I can’t imagine ever falling for anyone else let alone have anyone else around our daughter. I just want the hurt to stop , how do you get over someone ? Help someone please . 😪