Hello Past? Are You Still There? Or Still here?

This might be a bit random, but here we go...

There's this point that always seems to arrive in a relationship. At first, everything is great. It's new. It's fun. It's exciting. And the 'little' bad things that you've noticed just don't seem so bad. And clearly, all else is so wonderful that you can overlook them/live with them. But then that point arrives. Some incident that changes that rose tinted sheen you had everything awashed in. Now, you can no longer smooth over those cracks. You can no longer overlook anything because every which way your thoughts turn, it seems to be staring you in your mind's eye.
Usually, it involves discovering something from your partner's past. Something that has somehow managed to rear it's ugly head into your present. So now what? What of the future?
As reality sets in and the dreams begins to cool into the harsh light of day, how do you move forward?
Well, I guess it depends on what you've discovered. And what you're comfortable with.
If it is the past rearing it's ugly head but it is still living in yesteryear - let it. But if the past happens to somehow be very much in the now, I would pay very close attention.
But save yourself some time. If something really doesn't sit well with you, if it makes you squirm inside. Drop it. It will never right itself. It never does. Because eventually, you will no longer be able to compromise yourself that much. And so you shouldn't.
Don't let the things you accept become the things you regret.