I recommend limiting one's involvement in other people's lives to a pleasantly scant minimum. This may seem too stoical a position in these madly passionate times, but madly passionate people rarely make good on their madly passionate promises.
It is explained that all relationships require a little give and take. This is untrue. Any partnership demands that we give and give and give and at the last, as we flop into our graves exhausted, we are told that we didn't give enough.