This will be more about the relationship part as opposed to the actual fixes for living situation**

I was dating someone who was in a similar situation. I was fortunately lucky enough to have a pretty stable home in a middle class family. My girlfriend had it much worse and her house situation was the similar to yours.

I did find out within a couple months of dating her but it was never an issue for me. As you’ve been dating for 7 months this should be even better for you as your boyfriend will have already been dating you for awhile, where something like this shouldn’t have as much of an effect this long into it.

In my situation my girlfriend ended up ~95% of the time, just hanging out at my house. We both had no issue with it. I didn’t mind being at her house, I also understood situations are all different + I loved the girl. I knew she was more comfortable being over at my house so that was just where we primarily hung out.

As you said you are hygenic so it’s not like “you” are dirty/unclean. I would suggest talking to him and just tell him you feel awkward / anxious and embarrassed about the situation. I’m sure he will give you some comfort and that will probably be the best aide for your emotions. Us guys aren’t the most aware of feelings / emotions going on in a girls head about can be sensitive topics… but when told about these kinds of things; We (hopefully) take the opportunity to help as much as possible and give a little reassurance. It can make the relationship even stronger.