In a relationship together, you stand a good chance of making it last long-term -- but that isn't necessarily a good thing, unless you both do the hard work it definitely takes to learn and grow, both as individuals and as a couple. The problem between you shows up as a heavy energy, a certain level of control, possibly even guilt, that simultaneously binds you together and drags you down. You secretly feel more vulnerable but take the role of the more dominant partner in response.
Instead of using love, trust and support as the glue that binds you as a couple, you fall back on fear, guilt and control. The relationship most likely moved slowly at first; now your bond deepens over time and you feel more and more devoted. But when trust should be developing, instead a block prevents that from happening. Your lover represents all the qualities that make you the most insecure -- personal strength, individuality, ambition, independence -- and you respond with coldness, or by exerting authority. This relationship stands a strong chance of becoming all about responsibility and duty, in the heaviest sense. Even though this sounds grim, you both have control over it. Gently but firmly resisting any attempts to control through fear or guilt are important, as is facing down any insecurities that arise and withstanding the resulting feelings of vulnerability.