This is an intermittent meditation method, you do it for just seconds every hour and it has a real antidepressant effect. You can spend a few minutes in the evening doing it but I find it’s most effective if I aim to spend 10 seconds every hour — which may sound difficult to remember to do. My reminder is to just do it every time I go to the bathroom which is about once an hour because I drink a lot of water and tea — there’s a lifehack!
If I do this consistently I find (interestingly) its effect akin to Tianeptine, the enigmatic antidepressant Nootropic. Loving-kindness meditation is NOT a metaphysical thing — it’s just a way of firing up your mirror neurons.
Please give that a try!