Yes, you need to prove that the marriage has broken down and it would be difficult to mend the relationship. Common reasons for a divorce include:
adultery
unreasonable behaviour
desertion (for at least 2 years)
separation for 2 years and an agreement to the divorce from both spouses
separation for 5 years
Incompatibility with your spouse or ‘irreconcilable differences’ are not accepted as grounds for a divorce. In such cases, it may be possible to establish unreasonable behaviour for example being emotionally distant or abusive.