I think this is quite common actually.
On my wedding day, my very soon to be FIL took me aside and said, "If there is any doubt about you marrying (my DH), just tell me and I'll go upstairs and tell people. I want you to be sure of what you doing."
Now, he didn't say this because he didn't like me. He loved me like I was his own.

He had a divorced DD and didn't want us to feel pressured or like you stated above and that it was "too late".
Also, I had given his son the engagement ring twice because I was making sure of what I was doing.

I'm sure my actions had him wanting to make sure of what I was doing that day.
Marriage is supposed to be "til death do us part"--that might be a long time!
-.-.-.-
My sister is separated after 30+ yrs. of marriage. It is the hardest thing we have ever gone through as a family.