If you don't love yourself, you won't be happy with yourself. If you can't love yourself, you can't love anyone else. You can't give the love you do not have. You can't make anyone love you without loving yourself first.

I am not sure that you can be taught how to love. In many ways it is innate - just watch and see what small child effortlessly does. But you can be reminded of it and invited to it and reminded of it.