How to break a BFP to a friend with fertility issues

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Hi, so I have a friend of mine who has had fertility issues, she confides in me a lot and it's very unlikely her and her partner will ever conceive a child together.
No one knew me and my partner were trying for a baby not even any of my friends so this includes her.
I am waiting until after my scan to tell people I am pregnant but I'm wondering how I will tell her. I do not want to do the whole let her find out for herself sort of thing when my belly starts to show.. (she's also my neighbor) but I keep thinking of how it hurt when people told me they were expecting and I hadn't got my BFP. And I don't have any fertility issues, therefore I know it will hurt her and I don't know f she'll be able to hide any emotions if I tell her face to face.
Does anyone have an experience in this sort of thing? How did it go? What did you? 
Any help would be great, thank you.