How can I clear borage from my garden?

I need to clear my garden of borage. I have thoroughly dug it twice but it still comes back. It is now growing in the cracks of the surrounding concrete! Help.

 

Don't dig it all up... lol..Borage is an excellent companion plant for tomatoes, squash and strawberries. The plant actually improves the flavor of tomatoes growing nearby.
Borage flowers and leaves are the traditional decoration for gin-based summer cocktails, and may be set in ice cubes to garnish other drinks.
The flowers and young leaves may be used to garnish salads. dips, and cucumber soups.
Candied borage flowers make attractive cake decorations. Chopped leaves can be added to soups and stews during the last few minutes of cooking.
The leaves can be cooked with cabbage leaves (two parts cabbage, one part borage.)
Because it is a tonic plant for the adrenal glands, borage provides an invaluable support for a stressful lifestyle.
Borage is rich in minerals, especially potassium.
A tea made with borage helps to reduce fevers and ease chest colds.
An infusion of borage acts as a galactogogue, promoting the production of milk in breastfeeding mothers.Borage makes an excellent facial steam for improving very dry, sensitive skin.
The flowers may be dried to add color to potpourri....I had same with Comfry, till my Animals were grazing it, now non left apart from some I planted in spare ground,away from them, as i need it for my dolly tubs,. fertiliser for plants.