Flat Mates Very Comfortable Dating Should I Be Worried?

Anonymous
So a girl I'm newly dating has recently moved into a house where she shares with a guy. Similar age they have their own rooms however I'm slightly jealous as it appears that they are quite close already. The guy cooks dinner and they go shopping together to throw more into the mix this is a long distance dating so we are only able to talk by call or send messages after work for both of us like 18:00 which I don't feel happens a lot in terms of calls. Obviously she lives with someone so it's inevitable but she speaks very highly of them and for someone you've only just met makes me feel slightly uneasy.

How can I better deal with the situation or any tips.
Flat Mates Very Comfortable Dating Should I Be Worried?
Flat Mates Very Comfortable Dating Should I Be Worried?
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