Do not boil the honey!
It will drive away all of the flavor/aroma; if you do that you might as well just use some cheap syrup.
Honey is fairly sterile in its concentrated from, nothing will grow in it until it is dissolved in water.
If I was you I would just heat the jar so it pours easy and just poor it directly into the must if this is what you plan to do.
Remember that fermentation will restart in the presence of yeast; once you add it your wine will no longer be stable.