I'm interested in a pre marriage agreement. I own a few properties and I want to protect myself.

You are wise to want a prenuptial agreement.  A properly drawn document can make things very simple in the event of a divorce.  In such a document, you can address issues such as retaining pre-marital property free of claims by the other spouse, how to treat property acquired jointly during the marriage, matters of alimony, among a myriad of other issues that can arise in the event of a divorce.