How beautiful and sweet of you!
This is very genuine poem; few are those friends who'd be ready to lighten up our life in bad and good.

I loved the significance of death and life in wind and candle; once yours is off as in departing this life; very faithful :)

"I'll help you see what you can feel but not see"
^
that's really a nice warm line; sometimes we really need true friends to help us understand.
I can relate to that line.

I was really keen of your last stanza, it was well and neatly written. It was a very nice picture to imagine.

Other than the content, I found your structure to be coherent which made everything in the poem smooth.

I have few suggestions;

-capitalize the title, into A Lit Candle;
-also this word starting a new sentence :
thus : Thus

-and I genuinely believe that it's better to replace
the " :" by semicolons ";" since they are used to explain or elaborate. But it's your poem I just think it looks a bit off of literature when you replace the semicolon by them.

Keep the amazing poems coming <3