oh for goodness sake !
now you don't feel safe !
give him the month's notice.
it's now becoming one issue after another, and it started off with him using the kitchen for too long the other day, 14th Oct it's now 17th
you are the person that didn't issue a contract, didn't seem to take references, did you carry out a credit check ?
you decided you wanted a lodger but seem very unprepared for having one - you are not stupid you know how to use the internet and have a Mumsnet account and can post, you managed to buy a property
why on earth did you not find out about lodgers ? there is enough info on Google.
and as a woman living on her own, you chose a man to lodge with you ! ?
why.
how many lodgers did you interview, or was he the only applicant. or the first applicant ?
you are now putting yourself into a situation where you are going to have to stay in all day every day, and follow him around the property / garden or stay in the (shared) kitchen 24 hours a day
maybe you could invite family / friends to come and stay with you as much as possible for a month.