Give/send my love to somebody
Definition 1 of 1
Pro Tip 1/3Warm Wishes
Shows you care and wish the person well. Used among friends or family. 
Next time you see Grandma, give my love to her.
Pro Tip 2/3Second-hand Greeting
Use it when you can't greet someone in person, so someone else delivers your message. 
If you bump into John, send my love to him.
Pro Tip 3/3Casual Tone
It's informal, suitable for close relationships, not professional settings. 
Hey, when you see your sister, give my love to her!