Let's hope for other, better, more harmonious aspects between you, because this one isn't a whole lot of fun. It lends your relationship a feeling of unreliability, as if your partner, especially, just can't trust you to be there when they need you. If this tension between you, be it subtle or strong, seems familiar, it's probably not a coincidence -- you may have been lovers in a past life, and you might have let this person down or even broke their heart.
In this life, that old wound still throbs every now and again, and your partner might notice just the smallest undercurrent of sensation that they shouldn't let their guard down with you. Anytime something unexpected happens between you -- a change in plans for your date, a missed phone call, things of that nature -- they probably have a hard time not concluding the worst. This feeling of distrust could be completely undeserved on your part. You might behave like model citizens in this affair, but you might never be able to convince your lover fully that you really, truly do care about them and that you're really in it for the long haul. Not to mention the fact that with an aspect like this one between you, the long haul could be hard to sustain. Whether this serves as a hard but important lesson in learning to trust each other despite your misgivings, or just makes it too hard to be together as a couple, is really up to you.