Just wanted to reply to you about 'its more difficult to divide the assets if you are not married'
This is not true, if you are not married, then you can, in the event that you break up, agree to divide your assets however you want to. The key is that you 'agree'. Once you are married, in order to get a divorce, the state will get involved with a brief to ensure that children and dependents are looked after.
If you bring roughly the same assets to the partnership, and earn roughly the same going forward and can agree how you would split them in the event of a break up, and trust each other, the advantages of marriage are pretty much limited to the avoidance of inheritance tax in the event of the death of the first partner.
If one of you owns/earns more than the other, it is in the interest of the person with fewer material assets to be married. In this instance, it is very much not in the interest of the asset-richer partner to be married, unless their interest is to provide security etc.
I do wish that this stuff was covered in schools...all the best.