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.
You cannot hit a target if you cannot see it. Once you have become clear about what you want from your career and in your love life then you can start to visualize yourself in that space. If you have been unfulfilled in past relationships, with lovers and workplace it will be challenging get out of the cycle of being unfulfilled. Visualizing yourself as you would like to experience your relationships and successful career opens your mind on a subconscious level to the belief that obtaining these things is actually a possibility for YOU. Hitting your target is much easier if you can see what it is that you are aiming for, so set forth your intentions.