I'm pretty angry right now. Should I say "No" to this 'friend'?

Normally "D" asks me for my squash racket and ball when he's off to sport and I give it to him without any bother. The other day, I had some exam. It was late at night, and I needed liquid paper/white out. There weren't any nearby shops open, and I was panicking, with less than 12 hours left. I messaged him for it, but he didn't reply. Then I approached him (lives in the same corridor), and asked him why he didn't reply, as he knew I had an exam tomorrow. He told me he ran out of credit, so I told him then that I live just down the corridor. Then I was like "anyways, can I borrow your liquid paper just for tomorrows exam?" He was like "My liquid paper quality is not that good, and it's running out..you can try asking others". I was kind of furious. Wasn't in a good mood before my exam. Now that it's all over, i'm wondering what I should tell him if he comes to me for my sports equipment. I'm kind of weak saying "no".