Romance and love have big role in a successful relationship. Both terms are feelings that can be expressed in the same context.
However, love is an inner feeling felt by someone towards another one, whereas romance is an outer gesture towards another person.
Love may be expressed in the form of devotion, affection and commitment and there is no need to show love in outer expressions while romance is an outward expression.
It is simply said that both romance and love are two sides of the same coin or relationship and so both can never fall apart in a healthy and prosperous relationship.
Therefore, love and romance have different expressions or gestures, but both are needed to maintain a successful relationship.