Looks like Stinging Nettle to me.

GARLIC MUSTARD.
Alliaria petiolata is a biennial flowering plant in the Mustard family, Brassicaceae. You can see the cross-shape flowers (Cruciferae).

I'd have said that too at first glance but it looks too compact. Pachyphragma is similar. did you buy the plant or has it self sown in your garden where a plant used to be.

Always called it Herb garlic

Definitely Alliaria petiolata, it's a weed in gardens.

Another common name is Jack-by-the hedge which indicates where it likes to grow.