I am your marriage specialist.
Here is my advice:

Don’t get married.
If you must, don’t get married more than once or twice.
Don’t give any money to your partner (none).
Always have a prenup if you absolutely must get married.
Don’t marry anyone you don’t know (I mean that).
Forget a domestic partner—they can be worse than a real partner.
Don’t believe your partner if they tell you they have never been unfaithful (that’s a total lie).
Don’t forgive and forget your partner’s infidelity (it’s impossible).
Don’t go snooping around in your partner’s pockets as you may find something you don’t want to know about (trust me).
Don’t run a marathon with your partner—they will beat you and never stop talking about it (to everyone and anyone).
And lastly, if your partner is dying, you may sit by the bedside, but, again, don’t look into any pockets.

Call/write if you need more structured advice. I am free.

Sincerely,

Winnie Lee