You do not remove the leaves, just wire around them, but you cannot wire tender green branches. Shaping into -heart, star, circle, etc. is considered topiary. Bonsai is the art of making a small tree in a pot look old but natural, though people do combine the two as you are. Your long, thin branches are typical of a climber vine, especially when growing indoors, but at this point you need to develop more branches by pruning. You can snip those at whatever length you want at a leaf that will force a new branch in the direction you want it to go for shape. http://www.bonsai4me.com/SpeciesGuide/Jasminium.html