I lent my BF 2 roofrack straps which unfortunately he then accidentally because he didn't engage his brain and check (he tends to get lost in his own head) left in a vehicle which he sold. He sheepishly told me and although I was irritated it's no big deal really as I don't need them at the moment. But what pissed me off is that instead of automatically replacing them he told me he'd replace them if I ever needed some, i.e. sometime in the future, maybe. Now, I was brought up that if you borrow something you return it in the same condition, if you lose or break it you replace it. An added problem is that he's just become unemployed so I feel a bit bad asking him to spend £15ish on this; it was an accident, I don't presently need them, and I can afford to buy some myself. But it's the principle, and his attitude has pissed me off. What do you think.