Even if you both have the best of intentions in the beginning, this relationship could be very intense, and not in a good way. The best relationships give us a better sense of ourselves and provide a strong foundation from which we can grow into the people we've always known we could be. Unfortunately, this relationship isn't that type at all; quite the opposite, in fact.
Instead of encouraging you to be the individual that you are, your lover tries to dominate and control you, either through criticism, well-communicated disappointment or a host of other manipulative techniques. Instead of creating a feeling of lightness and joy together, they drag you down into the bitter depths of human emotion. And don't misunderstand -- they don't consciously want to have such a negative effect on you; they simply aren't able to help it. They behave almost compulsively, as if they're acting out a script that's running through their mind. They keep secrets from you as a way of keeping you off balance, and you get into arguments whenever you try to move the relationship onto a more honest, aboveboard plane. This all sounds very harsh, and it is. But knowing beforehand what the negative potential is for this relationship might help you to forestall the trouble -- or avoid it altogether, by looking elsewhere for a love connection.