If you are still thinking of marrying this man and having children with him, I really suggest you keep reading this Site. The truth on these boards is not sinking in yet. Read the "stickies" at the top, and read some more threads, new and old, and then reread your original post.
Please don't go ahead with the wedding because of money spent, honeymoon arranged, or to save face. Disentangling down the road, with kids, is more expensive.
I wish I knew what I was getting involved with before I married.
Wishing you the best.