Hi Kyla I agree with everyone else it is hard and nothing prepares you for it.
Everyone else has said all the right things I just wanted to say hi and lend my support. Make sure you take care of yourself he needs you to be strong for him and use your family and friends. Get them to babysit your daughter it will be max about 8 weeks till he comes home and in the grand scheme of things its not that long to lean on other people and you can always make it up to them when he comes home Remember people want to help you so let them!
Take care and keep us updated on Liams progress
good luck
xox