Can there be any problems behind love?

Love is a good thing. Everyone definitely falls in love. A person falls in love with another person and they build up a relationship (study each other, for example, the background, circle of family and relatives, circle of friends, beliefs, etc.,) and finally tie the knot. But that love sometimes can create unwanted mistakes or problems. Some mistakes can be retified, but some mistakes you make only once can ruin your whole life.