how do i start talking to him?

So if bạn saw my trước đó entry, "does he like me... hoặc not?", bạn probably đã đưa ý kiến he does indeed like me. If bạn haven't read it yet, then bạn should probably go and check it out so everything makes thêm sense.

Two people đã bình luận saying that they assumed he liked me and I should try talking to him. Thing is... I don't necessarily know where to start. It's not like I'm a complete stranger to him - I've talked to him before, it's just that conversations don't go the way that I plan them too. Either we're too shy to say something else, hoặc someone barges in and takes the limelight, so he ends up talking to them and not me.
As I đã đưa ý kiến before, this guy is one of the most được ưa chuộng boys in school and he's extremely musically talented. He loves playing đàn piano and preforming magic tricks. He's quite weird, actually, and he's pretty poetic. He likes diễn xuất and is probably one of the best singers I've ever heard for our age.
Again, I don't know what kind of topics to start talking about... I've always had this extremely high social anxiety level since I was bullied mercilessly in the past. I don't have any Những người bạn (literally, I'm not exaggerating) and I find it hard to make friends. Let alone talk to the guy I like! So what can I do to start a conversation with him?