I'm going to take some artistic license with this answer since it seems to me that is what the OP is looking for.
For the benefit of literary aesthetics and depending on mood, I would recommend:
to scatter by or as if by sifting; sift sugar on a cake
I could see my vague reflection on the misty window sifting my surroundings.
or,
to be diffused through
I could see my vague reflection on the misty window percolating my surroundings.
or,
to make soft or softer
I could see my vague reflection on the misty window soften on my surroundings.
Other possible options are: Deliquesce, Relent, Yield, Surrender, Cede, Relinquish, Concede
EDIT: Notice you seem to be looking for something that is not literal to the circumstances but a romanticized version of it. As so, and again considering literary aesthetics (always subjective but an opinion is an opinion) and the various possible moods of the scene you wish to convey (harmony, apathy, anxiety, etc.):
Coalesce (neutral, apathy)
1: to grow together The edges of the wound coalesced.
2: to unite into a whole : fuse
3: to arise from the combination of distinct elements
or,
Entangle (bad, anxious)
1: to wrap or twist together : interweave
2: to involve in a perplexing or troublesome situation;
or,
Cleave (firm, serious)
to adhere firmly and closely or loyally and unwaveringly
or,
Wed (romantic)
1: to take for wife or husband by a formal ceremony : marry
2: to join in marriage
Espouse (romantic)
to take up and support as a cause : become attached to
or,
Weave (neutral)
to interlace especially to form a texture, fabric, or design