Well, from a human's perspective, you're just about right. Mosquitoes can spoil an otherwise pleasant summer evening by their persistant harassment of us in an effort to suck our blood. And in some parts of the world, mosquitoes can be dangerous because they can carry deadly diseases, like malaria. Male mosquitoes sip nectar from flowers and are completely uninterested in your bare skin. In fact, some species of plants, including an endangered orchid, depend on mosquitoes for their pollination.
Mosquitoes are also important to some animal species as food.
Frogs, lizards, birds and bats are all quite fond of mosquitoes for snacking. If humans are still around then, I think it would be completely reasonable to think that they could move to a different location. Some of the outer moons of Jupiter and Saturn would be a lot warmer then. They might even have liquid oceans at that po int. Actually, in space your heart would beat slower because it would have to work less, not more.