I believe the number one reason to get married is because of shared love between two people. A person in love will want to share their life with another person. Marriage is a celebration of life between two people. It is an open and loud commitment of love to one another .Many get married because they have an unexplainable chemistry with the other person.
People want another person who shares their life goals and passions so they can do them together while making memories to tell their grandchildren. They want to grow and be emotionally connected with that person in their life. The person is there to support you in your best times and your worst times no matter the circumstances. Being married shows that they have commitment and are not looking for a ride or an easy escape route later on in life. If you are married you can live in one house and have two people paying bills instead of just one. Also you can share you successes with the other person and they can share with you.
Another reason to get married is to have a family. Many people get married to have kids and being married provides a stable environment to raise kids. They now have more family to be loved by and accepted. Being married can have a few health benefits for both people. Many people who are married tend to live longer and have better health than single or divorced people. Being married makes a lot of things easier to accomplish.
It is easier to get a loan or buy a house to live in. There are over a thousand federal benefits to being married. Being married shows that they have commitment and are not looking for a ride or an easy escape route later on in life. You would also have access to some of the best health care available.
Society is made to lean more towards married people hen people who are single of cohabitating. In marriage things like fights are not as serious as they were when you were dating.