Marriage was not an only option because there was several options. For example one option was to talk it over. Have the families talk it out. I am sure that they have someone that they would not mind discussing it with. I believe Romeo would be the one to talk things over because Lord Capulet does not mind having Romeo at his party. On page 602 Capulet says "Content thee, gentle coz, let him alone"; another quote "Verona brags of him to be a virtuous and well-govern'd youth. I would not for the wealth of all this town here in my house do him disparagement." Throughout his saying to Tybalt, he explains that Romeo is well respected and is well known. Lord Capulet respects Romeo; therefore, making a conversation with him would be easier than marrying Juliet in secret. Capulet would take some time understanding and give feedback to Romeo, while Romeo is technically the messenger for both his family and Juliet's family. This proves that there is another option than marriage.