I feel for you....you must be devastated at the news.......I would just give them the space they need but definitely keep the communication open between you both. If you offer support and let them have the space they need then I am sure that they will respect that.

Is he getting some support??? Medication???Counselling???

I would just clarify some things before he moves out......for example are you both going to continue to have a relationship???....or see other people???.....set up clear boundaries, that you both agree on and then there is no confusion.

You may also find some counselling helpful for yourself. I think you are from the UK and relate offer counselling services for relationships....you could give them a try.

Sending you a hug....you will get plenty of support on here...Good luck x