dude dont be selfish, so shes spending time with her best mate and the baby so what?! You dont need to see her all the time, she needs her space. As for the infatuation it sounds like your kinda jealous that shes talking about this baby all the time. Women (being one i know) mostly tend to have a natural urge towards babies (unless there completly unmaternal) i know im like it! I work in a nursery 2 days a week and i talk about the kids there to my bloke. He'l ask me questions about some of the names he knows and we'l have a little chat, just as he talks to me about what hes done at work etc.
If she wants to talk about the baby and it makes her happy whats wrong with that? Like someone else said you should only worry if she tells you she wants one with you...stop freaking out like! Shes free to spend time with her best friend if she wants, you shouldnt feel neglected for it or make her apologise for it....
******* 7 Times World Champion Michael Schumacher - the ultimate sporting hero *******