I totally believe that your feelings are normal. Keep in mind that many men move on faster than women. It just takes us longer to want to date someone else much less marry them.
I don't think you're jealous at all and I think you're completely normal. I've been divorced a long time, 8 years, and I still sometimes get irritated that he does a lot of "fun" stuff and has a retirement.
But I don't love him, and I am not really jealous.
I was also upset the first time my kids met the new woman. I think part of me was afraid they'd like her better. Silly I know, but who knows why we feel the way we do sometimes.
((((hugs))))