Just got out of a relationship and I feel the need to find another girl soon when I get back to college and jump into a relationship. How do I learn that I don't need a girl in my life to enjoy it and just live life as a single guy?

I feel like it kinda makes me come off as desperate and what not, plus it's not healthy. It's kind of like an unhealthy obsession with wanting that sort of intimacy with someone - how do I learn to have a life of my own? How do you guys deal with this sorta stuff?