Latent heat of fusion is the energy required to go from solid to liquid. Latent heat of vaporization is the energy required to go from liquid to gas. When the phase changes goes in the opposite direction, negative values of energy occur. When water freezes, energy is released. Evaporation is not the same as boiling.
Evaporation takes place at the surface of the liquid.
It takes energy to evaporate the molecules, and the object then feels cooler. That is why we sweat. Two bodies in thermal equilibrium with a 3 rd body are in thermal equilibrium with each other. Heat pumps require work to take heat from a cold body and remove it to a warm body. Refrigerators, freezers, and air conditioners do this.