Not to me, no. I mean, my mother for example married my original daddy over 40 years ago. When he died in 2004, we were very lonely. Then a friend of my daddy's when he was a teen, a man that my mother knew back then when they were first dating, showed up at a funeral for a friend of my mother who she knew back as a teen as well (my daddy, this other friend who died, and the man I mentioned, all were good friends and my mother knew them all back then). So when she showed up to the funeral after he'd been murdered, my now stepdad was there to attend it. They remembered each other and started spending hours and hours on the phone each day. Eventually, soon after, they got married. I found that my new dad was just as good of a guy as my first daddy.
So she doesn't feel like daddy was less important due to dad being around. Actually, she is glad there was more than one person that she could marry and love.
I feel the same way. It's hard to believe I'll marry given my circumstances, but knowing there's more than just one person who might love me actually makes me feel better. Of course, once married I would not look for any other person, and I wouldn't feel like my wife is less special because there are other women out there either.