Personally I wish Beatrice gets married at York Minster, obviously do to the name connection, the fact that she's involved in different organizations surrounding it, and it would be the first royal wedding held there since the Duke and Duchess of Kent's in 1961.
Also concerning Edo, withholding my personal opinion about him, if he makes her happy then I wish them all the best but if that's not the case I hope Bea realizes it quickly and leaves the relationship.
I don't see it happening. Among other things as there would be no logical place to hold the reception. Its not a royal peculiar, nor is there a royal house near.
The Duke and Duchess of Kent married there by tradition. Its traditional to marry at the family church of the bride. Katherine grew up in York, the wedding reception was held at her family home Hovingham Hall. It is now home to Katherine's nephew.
Windsor isn't simply a 'royal wedding venue' for the York girls. It is their 'home church'. They grew up near Windsor. They went to school in the area. I'd be shocked if they were not married there.
The fact most weddings are in London or Windsor is simple logistics. There isn't a church large enough near either Sandringham or Balmoral for the massive social weddings they have. Unless they had friends with a large estate near by, that they could use to host a reception, the added expense of a reception space and security for a wedding would sky rocket.
I don't expect a wedding in 2019. But like Harry and Meghan, I don't think we will see a long dating relationship either. Yes Bea's last relationship was ten years but she was also very young during most of it, getting through school and started in adult life. She is in a very different place in her life. Like Harry, Bea starting a relationship later in her life then cousins who had long courtships, will shape how long they date IMO.
In July it will be a year of their dating, so they are reportedly dating longer (I mean James & Alizee). And there is no child to be involved.
All the best to both couples!
Its not a matter of who dated longer. There is no limit on how long one has to date before they marry. Its about where they are in their relationship. Some couples are more secure quicker, or ready for commitment sooner.
ITA, it could just be a bit of self-consciousness, and Edo not used to being around cameras, having his every move and behavioral reaction scrutinized. Often, pretty young men are also unfairly labeled and judged as overly narcissistic playboys. For all we know, Edo could have a sensitive soul. 
