Single and content-?

I'm 21 and in my last year of my undergrad. I've always been single yet it's only started to bother me now. I went through my entire high school without a boyfriend (mostly because of strict parents), and it never quite preoccupied me, I was too busy. But i now find myself somewhat longing for  that type of companionship and it's one of the worst feelings. I guess I just feel lonely. Anyone get this?