This sounds like a communication breakdown. If he were more affectionate with you, what changes could he see that would indicate that this was a worthwhile thing to him? In a sense this does have a "What's in it for him?" ring to it, as you want him to change without it being a forced change, right? "How To Get A Man To Do Whatever You Want - Ed Kang" is a discussion over on Facebook that may have some useful points to consider. "How to Win Friends and Influence People" would be another set of ideas to read and consider if any may apply in your situation. Lastly, beware of "4 Horsemen of the Apocalypse - John Gottman Research" as lines like this raise a yellow flag for me:

He's always spending time on the computer or watching tv.

Doesn't he do other things too like sleep, bathe, eat, and work? You may have to figure out what are those things that for him are important and significant and support him in those along with making sure he has incentives for showing affection. If he gives you a hug, is there going to be some remark of how inadequate it was or, "Why don't you do that more often?" that may be seen as something disrespectful in some ways.

To a certain extent I think it's normal for physical affection to decrease over time, as you get "used" to a person. But at the same time it doesn't sound good at all that he gets angry when you bring things up, or that he expects you to be at his beck and call all the time. He may just be taking you for granted... but that's the most optimistic possibility I can think of.

First of all, stop doing everything for him any time he asks. You love him, good. But you need to be your own person too, or he won't be able to respect you. You'll just be the person who does things for him. Go out with your friends, have fun, spend time apart so he misses you and realizes you won't always be there.

But most importantly, you may need to just sit down and talk to him about this. Not "hug me and hold hands now or else" but just calmly talk to him about how you need more physical displays of affection.

• Perhaps he is showing you love in a way you don't recognize

He does not show you any affection at all? Sometimes men and women have different ways of showing love. Here are the five universal "love languages":

• Verbally kind/adoring/loving words
• Spending quality time with you
• Gifts
• Doing things for you (your laundry, fixing the house, washing your car, etc)
• Physical touch

Are you sure he does not show you any affection in one of these ways?

It does sound like a communication issue, try to have a gentle, non-agressive discussion, as JB King suggests.

• Perhaps he "won" the game

Another possibility, very sad, yet sometimes true, is that men can sometimes be challenge, or goal oriented. Once that goal is met, like a video game when you beat it, he can become bored. If this is the case, I don't know what to tell you except that he is very shallow for only valuing you as a challenge, a new mountain to climb and conquer.

I think that if he loves you like he says he dose, he will swallow all that pride and stand tall. I hear he has his focus and is not looking back. I know that theres a bond between you both. I can be strongter than ever, you both need to keep the faith and talk like adults. He might be scared, upset, and really confused. Yep I am sure my cousin said, "He was talking in the mirror alot".