EHYMum,
Actually I'm also not sure the sure-proof way to make a child like reading. I used to take her to the library once a week or fortnight to borrow books in the hope that she might like it. I guess I did a lot of groundwork before she started picking up the books: practised the phonics with her, got her younger nephew to read with me to tempt her to try to read, read to her on the train when the journey's a long one, read storybooks to her every night etc. I tried to look for opportunities that I could tempt her with the benefits of reading. Sometimes when we go out and come across those doors that say,"Pull" and she pushes it and the door doesn't budge, I'd tease her,"Oh, it says 'pull'. You can't read. If you can read, you'd know you need to pull, not push." I'm not sure if these things really work. I was desperate to try everything becos at K1, she couldn't read. It was towards the end of K2 that she started to read okay, then in the beginning of P1, she started to read 'aggressively'. She actually finished reading 'Charlotte's Web', a sec 1 lit text.
However, my kid only likes fiction books. So the other challenge for me, on top of controlling her reading, is to try to get her to read non-fiction. For boys, I think they prefer non-fiction books, so you may want to try it out to see if it interests him, esp using the subject of his interest.
I hope what I shared helps to give you some ideas or 'inspiration' on how to encourage your boy to read.