Is OTHER wrong in the post ? POST : So I recently moved in with my friend, who I've known since the start of university, and his girlfriend. She's working, he's still at university and I graduated a month or two before we moved in. 

We found a really nice two bedroom flat together that was relatively cheap for city prices. Splitting the rent so that I'm paying much more than them individually but not more than them as a whole. All of which I'm totally fine with. 

Unfortunately there were a LOT more costs moving in than I originally thought there would be. We also had to pay to repair two major appliances within the first month. As I'm currently an unemployed graduate looking for work this put quite a strain on my finances and I found myself with very little spare cash. I had enough to buy myself food but buying new bottles of oil, salt, butter and seasonings was a bit too much for me to afford through the whole month. So I asked my flatmate if I could use some of his until the end of the month. He said that was all good and that was that. So over the next 3 weeks or so I borrow, or just use I should say, very small amounts of such food. Nothing that you would actually eat on its own but stuff like salt, pepper, mayo, olive oil etc. and not in large amounts (I'd say I never used more than 5% of any item of his that I used). Suddenly I hear from him that his gf is pissed with me using their shit and he basically asks me to stop, which I do. Then I find out the next day that he bought and screwed on a latch to the cupboard door where they store their food and padlocked it shut...

It's been about a month or so since then. Now I have no problem with not using their food anymore, that would be wrong (plus I took a part-time job to ease the struggle while I'm looking for work and can pay for myself) but I feel like by physically locking it shut with a key while we're the only 3 ppl that would ever have access to it he's insinuating I'm a thief. I haven't said anything as I do feel somewhat guilty as I may have misinterpreted and overstepped my bounds but just seeing it really pisses me off. What do you guys think?