Try viewing the world from a different perspective. We're all alone, but all together at the same time. Maybe try meditation, and help ground yourself back to reality / the universe. Embrace the simplest of human interactions that take place on a daily basis, as you watch the energy flow between the two of you.
Listen to the wind, feel the rain drops, embrace the sunlight, the birds chirping, and all that good stuff. Sounds corny, I know, but it does work.
You're not alone. You're in the middle of an absolutely amazing world filled with tons of beautiful, living, breathing energy all around you. You just need to open your eyes in order to see it.