In a past life, you were involved, but not necessarily as lovers. You may have been parent and child, or teacher and student -- some relationship that involved your lover as an authority figure and you as their charge. They looked out for you and took your education or your personal development very seriously.
Now, you've come together again in this lifetime, only this time as lovers. There may be an age or maturity difference between you, and in this case, that should work out just fine. Even if you are much younger or less experienced than your partner, each of you has much to teach to the other. This aspect lends a feeling of seriousness to your relationship, so you could feel from the start as if you're going to mean a lot to each other over time. That could very well be true. Your lover helps you out by keeping you grounded; they offer you their protection and wisdom. They give you the best advice they can, with your safety and education always foremost in their mind. Whether this relationship ends up being a short one or long-term, you both feel as though you're better, more solid, for having experienced the influence of each other in your lives.