So you know your partner well? Even a long relationship soul mates can't answer this question. By the time you decide to get hitched, with the thought that you know best about your partner best then wait for a while and rethink on it. Because married life often turns out to be full of unexpected disappointments and joy.
"Even in a most intimate relationship, there's a lot that needs to be discovered"
Money is the one big evil issue which always ruins your happy life. And this definitely applies to new marriages, as finances are the next big thing in your life even before self. So be sure, before marriage you have enough savings.
You might have stayed at each others' house many times, but living with your partner after marriage is different from your past. You start dividing your roles like who will clean the house, or be the breadwinner and take care of future kids and a hell lot of other stuff.
In-law wars are not new to anyone who had been married, we've all heard those nightmare stories of mother-in-law hating new additions in the family. These creepy in-laws always poke their noses in your life and want to know every single shit detail going on.
After marriage, you don't get free time to meet your old friends. Even in your free time if you breathe then I guess you are in trouble. All your free time should be given to your partner and your partner, that's the rule you must follow it.
No matter whatever this article will teach you, I'm sure you will definitely marry him/her. One can only advise you and rest is yours to decide.