This is Kate's jacket. = This jacket belongs to Kate.
That's our neighbors' dog. = That dog belongs to our neighbors.
Belong with means that things/people are similar and should be together. If one person in a romantic relationship says "You belong with me," it is like saying that it is destiny for the two people to be together.
You can also use belong with or belong in for putting an object into a category with other, similar objects:
That book about humans traveling to Mars doesn't belong in the history section. It belongs with the other science fiction books.
An object belongs IN a category, and belongs WITH other similar things.
Your ruling planet of Jupiter is going to throw a few obstacles in your path but this is not a bad thing. By encouraging you to take risks you can learn from your mistakes and this will make you stronger in the longer term. This is going to be a year of excitement and opportunity but your usual optimism may be a little quashed as you are more cautious than usual. Travel is highlighted as promising some new and exciting experiences that will provide you with much needed adventure, fresh challenges and possibly even new opportunities in the work related arena.