I know that catholicism is strict, but for normal (Bit of a weird term, isn't it? I'm sure you know what I mean..) christianity I follow abstinence and would more or less do anything other than sex if I had been with the person for long enough. I don't suppose that I should, but I can't imagine myself being able to last without anything, and I do feel bad for that.

To answer the question though. Oral sex is probably at your stage in catholicism (before marriage) frowned upon but will not make God hate you, by any stretch of the imagination.