I found a plant in my yard that smells really good! what.....?

The plant is kind of like a small tree that will probably get bigger. Green stem with small yellow flowers in bunches smaller than my pinky nail with 1.5 cm leaves that are velvety with small hairs. when a flower/leaf/branch is broken off it smells sweet. Almost like polo perfume for men. When the outer layer of bark/skin from the branches is peeled away, it smells like fresh cut watermelon! When a leave is torn off, or a branch cleanly broken it smells like lime or lemonade. I am really wondering what it is............I may get a picture, I will add it in a detail tomorrow. The core of the branches have white stuff inside which looked like sugar to me but is hard, definitely nothing like clumped sugar, but looks like it.... someone, what is it!!!!????????????????????