I had exactly this with my now DH.
As he is a lovely DH it worked out OK in the end.
Scarily similar to your situation. 2 yr old dd, knew him from years back, whirlwind romance (mainly on his part,I initially wanted a FWB type thing), lovely holiday etc, worked away from home a lot (he had moved in with his parents again), nearly moved abroad for work etc.
It came to a head one teatime as I was in my way home from work. He phoned to see where I was as he couldn't get in as he didn't have a key. I wasn't expecting him that night, was planning on picking dd up, doing her bed and bath then having a lovely bath and an early night.
I replied 'that's because you don't live there'. He went a bit quiet then said he would call me later.
We had a good chat. I told him he was moving in bit by bit, that I didn't have the wardrobe space for all his stuff, that I was worried about my tax credits claim, that dd was still getting used to him and that her dad was taking me to court for contact and it was messy enough already, that I wanted to live on my own after a shitty 2 year relationship then staying at my mums for 2 years. And that even if all that hadn't been going on as much as I loved him I didn't want to live together because I had my own home and he didnt. I wanted to live together because that's what we both wanted.
He did understand but was a bit hurt and I thought for a while I had messed up because he went a bit quiet for a few weeks.
For Christmas that year he bought me new bedroom furniture including a double wardrobe. Which was very much appreciated. I did feel a bit pressured again. Until he told me some of the lads had booked 10 days in Mexico over Christmas and he fancied going. I then realised that I had in my mind a lovely, cosy Christmas with him and dd but that I also actually did want to live with him.
I told him to go on the holiday which he did. Me and dd spent a lovely Christmas together and when he came straight to mine from the airport on 29th December his Christmas present from me was a housekey.
Been together 12 years now. Married for 3 months and have a 4 year old ds.
We still see time apart differently. I love my own space and love it when he works away. He likes nothing better than being with me, hates being alone mostly and still takes over the wardrobe space. But we work.
So speak to him honestly and tell him how you feel. If you claim any benefits that is ideal as an excuse even if it.is just single person discount.
And I definetly couldn't do with him working from home especially if you don't have a spare room so discuss renting an office/desk somewhere.