What Does One Do About A Loveless Marriage?

If the marriage has truly become loveless it can be difficult to bring it back to how it was before love died.
Some marriages appear over and devoid of love but with help and hard work they can be made to work. It depends on what has driven love away and whether or not both partners feel the same about it.
No-one should be expected to stay in a relationship which is dead despite all efforts to make it work and in these cases separation and divorce or often the only solution.
Some people choose to stay together for security and companionship despite not loving each other. In cases like these sometimes it's more safe to stay with a partner you know, in a situation where you have security than worry about whether love still exists and many, especially older people choose this option. Life out of marriage can be lonely.
It very much depends on the individual circumstances for the individuals involved.

I think a loveless marriage is worst chapter of one's life. People anyhow, do live in these kinds of relationships and see their end by physical death. While some do not have the patience of stamina to drag it any further and end up in a divorce.
I prefer the second type personally, because you are given one life to live and you can not destroy your moments while living a tense, colourless and joyless life. This does not mean at all that I am favouring the act of divorce. This is the reply to situational question asked. I hate acts like divorce but the same time I am very much in favour of giving room to your partner and accept each other. Sometimes misunderstandings do happen but people with broader vision find a solution to that and keep the charm in the marital life alive.

But a loveless life becomes a punishment and intolerable to live on further, so it becomes essential to get separated and give yourself a second chance to regain the charm of life.