I got lucid quickly but I think it may just have been a strong motivation to have an LD, along with just happening to choose the right method for me right off the hop. It can take time and it can differ strongly on the person; you're not the only one who's had to wait that long for one!

If you've only been trying one technique, maybe try a new one and see how it goes. Sometimes you just need a bit of a change-up to help your subconscious realize that LDing is still something you want to do.