Not saying relationships while still in high school or younger is a bad thing, it really doesn't mean much if you do or don't.
And relationships during college usually don't last afterwards, but can give you a good gauge on how approachable you are.
Don't stress about it before you're done with your studies, because it usually gets in the way more than anything. Once you've gotten through all that is when you can be concerned about it, but in the mean time just focus on getting the rest of your life set before adding someone else's problems onto the stack.
(But what does a 21yo college dropout who left his only serious relationship because she had bigger lifeplans that I didn't want to ruin know anyway. :P)