These living arrangements and being together all the time can create a bit of a codependent dynamic and doesn't encourage independence. That said, neither of you will have too many dating horror stories to exchange with friends – skipping the "dating scene" can be a good thing! If you make it through the teens/early 20s, then you'll have seen each other at your best – and worst. Your shared history will ensure that you have empathy for one another and smooths your social path because you likely have the same friends. When it comes time for high school sweethearts to marry, it's likely to be earlier in life than others, which can be good or bad. But high school sweethearts ideally have discussed what they want out of life – education, career goals, children, and the like – so there are no unpleasant surprises down the road.