Why would he just ignore me?

I don't think I'm in any position to help you, most probably I'm in a situation he is in.

Firstly, I think although you talked to him, you've not been giving enough signals that you like him. So start making things obvious ( if you really like him and have REAL sources that proves he likes you). He's actions are inhibited most likely by the fear of rejection, or you turning him down. Perhaps, another alternative is to give him more time, before he confess his feelings to you, as a shy guy will usually take more time to let a girl know how he feels. Note whether he gives you gifts during your b-day or like v-day. Then you will know.

I wonder if he has been hurt in a previous relationship where he gave it his all and got nothing in return. It seems like he's hiding something, and what may need to happen is that the two of you need to have a good heart-to-heart talk and get your feelings out in the open. You might openly explain to him that you like him and want to know more about him (that is a pretty safe compliment ,and something that most people would respond to positively). Then, set the tone of the conversation by stating that you want to be open and honest with him about your feelings so that he doesn't get surprised when you let it all out.

The best that can happen is that he will sense that you're sincere and he'll open up too. Maybe he's so crazy about you that he's scared of blowing it (blowing what you might ask), and to him, he does not know where to start. That's why you take the lead and get it going with the sincerity.

The worse that can happen is that you scare him away, and if that happens, then you really have not lost anything, you've gained the knowledge that he was not willing to put in to the relationship what it needed to flourish.

Guys are much more fragile than they seem. They will lose confidence when around a girl that they really like. They can be more relaxed around girls that they don't care about as much.

My (now) wife got me engaged in a really strange way. She was beside the pool at a resort painting her toenails and I found it interesting to watch her. It was a pleasure to watch this beautiful lady doing something very feminine, and I really wanted to go talk with her, but was shy and felt that I would get in the way of her work. She noticed me watching her, and she smiled and asked me if I would like mine painted as well, and I guess I was caught off-guard because I said "sure, why not?" I have never even thought about anything remotely like that before, but she got me at just the right time, and it was an incredible ice-breaker! The conversation went from one subject to another, and she explained that she had just broken out fo a relationship where she had given it her all, then found out that he was seeing someone else, but didn't have the guts to tell her! Before long, we were laughing and sharing stories, feeling like old friends.

I guess you just never know until you try.

Maybe he's just shy and is really scared to talk to you because he thinks he'll screw things up.

Well, he may be really shy or just a complete jerk it's hard to tell. Does he act shy even when he's talking to you around friends? Sometimes friends give a guy confidence if he is talking to you more when his guy friends are around maybe he's just shy, if it's the opposite. He's a complete jerk. Just get over him and forget it.

Well like you said he is shy and quiet maybe he is just really nervous to talk to you like he likes you but doesn't know what to say or doean't want to say the wrong thing. Ignoring I don't know what to tell you abut that. Why don't you ask him on a date or something and see if he will open up. Like coffee of something. Don't be shy either, it takes two, you know. Try it and tell me how it goes.