How can I help my boyfriend with his low self esteem?

Unfortunately you can’t give him self esteem. But you can help put him in situations, places, activities that you know give him confidence. Is there something he is really good at, or a place he really loves? Compliment those things, I feel like people try to compliment people on the things they hate about themselves and it just reminds them that they are insecure about that in the first place. And compliment personality traits too. I hope all that made sense.