how to make this (heart warming?) glow effect (cycles?)

i’m putting it in general because i don’t know how to… particle? lighting? (in cycles; or maybe just the compositor)
anyways, this is the picture

i want that warm glow effect but how do i do it? and it’s kinda blurry, but it doesn’t cover up anything, (i think)
and how do i make the background blur so much too?

Background blur = Depth of Field ( or (

The slight glow effect is probably a bloom. (

Bokeh is obviously faked (in fact I’m pretty sure I have the same image in my library) by adding the original render over the bokeh one.