If you have to love yourself before you can love someone else and nobody will love you if you don’t love yourself doesn’t that mean you’re unloveable?

I do not think that is true,i'd say most people don't love themselves yet they are loved.
I think you have to love yourself because you are with yourself from the begining til the end.
You have to love yourself to know your worth and you can choose the right person to love,to know what love really is and how to show it.