Here is an excerpt of an amazing Shiur on love, being alone companionship and marriage.
A concept explored by Tevia in Fiddler on the Roof
Full Drosh
A comment
Married couples are to complement each other so they can be fused as one. If I have nothing you are lacking and you have nothing that I lack, how can we complement each other and be fused as one? The present-day cliche for cause of divorce which is "incompatibility" is absurd. Married couples are supposed to correct each other to make them better versions of themselves so they can be fused as one. The stage of correction is very difficult but once the couple go past that, bliss is achieved, that is why they say, "your spouse should be like your friend", rightly so because a friend will tell you the truth even if it hurts and a friend will never let go no matter what.