In all healthy relationships, whether they be friendships, romantic relations, cordial relations, business relations, family relations, even arch-nemesis, there comes a very special time. That is the time of performing ritualistic mayan human sacrifices on the other person's lawn/porch until they call the police.
However, depending on the situation, you will want to go about it differently. If you are romantically interested, you should do it at dawn with a peasant's family, first scalping and then pulling out the heart. This is the symbolize the Gods blessing the beginning of a strong relationship in which the mind is pulled away from actions and instead the heart becomes the major player.
For a rekindling friendship, you should take a foreign warrior and throw him off a cliff (your friend's roof will do) at about 2:43 am (the Mayans, as most native South American people, had a very keen interest in time and dating). You may want to invest in a satellite clock to make sure you have the time right. You also may want to throw several foreign warriors off at once, to make sure one dies within the one minute time frame. Otherwise you have to do it again the next day. This is the represent the expulsion of negative feelings by means of forgiveness in the darkest part of your friendship. Note: if the sun does not rise the next day, it signifies that the relationship is doomed and the Gods have frowned up you. You should probably kill the other person to appease them, thus bringing the sun back again.
If you haven't tried this yet, it's clear you don't understand women.