Thank your the question. Just because the other partner does not wish to get a divorce, this does not mean it is not possible. However it is important to understand the rules and (legal) reasons for divorce.
Although there is actually only one ‘ground’ for divorce, which is that your marriage has irretrievably broken down, you must prove this to the court by establishing one of the five following facts:
Separation of 2 years with consent (mutual)
Separation of 5 years (no consent needed)
The grounds for divorce do not affect how long a divorce takes in most cases, but due to the lack of a no-fault divorce system in England and Wales, it can delay when you file for divorce.
If you aren’t prepared to apportion blame on your ex-partner then you will need to use a separation ground, such as 2 years separation with an agreement.
This may end your hope of getting a quick divorce unless you can show the court 4-5 examples of your ex-partners behaviour that has caused the breakdown of the marriage.
You will also require to understand that both parties have rights to matrimonial assets, these are assets acquitted during the marriage such as each partner's pension, savings, property etc. These may have only been paid for by one party but will legally belong to both and this requires to be resolved by way of a financial settlement.