Nothing good will come of this

I find myself oddly jealous when I know I shouldn't be. It's not the ages of the girls, because my instinct is to protect them rather than see them that way, but instead the whole thing of wishing I had more experience. That I was desirable to more than just the one woman. Don't get me wrong, I love her and would never truly want anyone else apart from her. I guess it's the ego of it all? The self confidence from girls expressing that sort of interest in me. It's not really possible because I'm ugly and unlovable though.