Today I got a new bunny, he is very young (but the pet store didn't tell us how old he was ) 

He is totally gorgeous, he slept at the end of my bed while I was doing some work, came up to my feet a few times, but he seems rather jitterey and especially in his hutch - he hasn't come out of his little cubby space for the last 2 hours and I'm wondering how I should help him feel more comfortable because I don't want the poor little guy to be scared

Any advice would be huuuugely appreciated, thank you 

First, welcome to BB and bunny slavehood! Feel free to head over to our welcome section to introduce yourself and your bun!

Bunnies can go away from their moms at 8 weeks minimum, so I hope your bun is at least 8 weeks. The first thing I would recommend is finding a bun-savvy vet who can give you pointers and assistance about age, breed, diet, any health issues (especially with a pet store bun as sometimes they pick things up from other creatures at the store), and "fixing" your bun when they come of age.
If you just got the new bun then he is going to be very jittery at first: new place, new home, new people. It's going to take some time for him to adjust. Let him explore a bun safe room at his own pace and time. Let him decide when to come up to you and when to give you affection. This will build trust between you and your bun since he won't be worried about you swooping down on him at any second for cuddles. Bunnies in general hate to be picked up and held (they are prey animals and you look a lot like something that wants to eat him) so don't think of it as your bun not being affectionate. I've had my bun for over a year now and she only tolerates being held in a very small doses and only if absolutely necessary.
Do you know about bunny diets? Since your bun is so young, make sure they've got a good quality hay (timothy is the best!) This should always be avaliable and it should be fresh and pleasant smelling. Also, at a young age buns can have unlimited pellets, but you want to make sure the bag only contains pellets. Avoid bags of pellets with "other" things in them: like nuts, corn, ect. These are actually really bad for your bunny. Since you think your bun is so young, I'd avoid veggies until you find out just how old he is. Bun can start on fresh greens at 12 weeks, but go slowly. One veggie kind at a time, and no more than 1/2 cup to start and then you can gradually increase. You can find a list of safe veggies from Binky Bunny at the top of your screen under "Bunny Info" I recommend cilantro.
If you have any other questions, feel free to post them here at the forums. Everyone here is really helpful!

Welcome, and congrats on gettng Sylvester.
If you go up to the top of this page, you will find a drop down menu with Bunny Info. There, you can read up on everything you will need and can expect to have a happy home with your new bunny. Check out the diet and habitat sections, and take a look at all the photos so you can see what is optimal for arranging for a healthy habitat. Be sure to start Bunny Proofing your home to avoid injuries to both bunny and your belongings.

Your bunny is called crepuscular, which means he is the most active at dawn and dusk. That means he'll sleep best during midday and in the dark of night. Your best times to play with him are in the morning and around suppertime. You can expect the first week for him to be somewhat shy and skittish, or with unexpected behaviors because everything is new to him and he hasn't learned what to do and where he feels at home and safe. Also, a baby bunny doesn't have certain basics down yet, so he's going to be learning to use his litter box, where his food is, and what he wants to sleep on, in or under. That's why the Info. section is a good place to start.

Welcome to you and Sylvester. Cinnabun and Pam gave you some great advice. Hope you post some pics of your bunny soon!

Gosh thank you so much this is all so much help!!!!!!!! 

For those who would like to see him, this is Sylvester 

Sylvester is so pretty!! Omg Well I think they said quite a bit you need to know, so welcome to BB! ^-^

Awwwwwwwwwwwwww, your Mimzy is gorgeous <3 

That little face is too much! Watch out, when he realizes how adorable he is, he will become a total spoiled brat and you will be unable to ever say no to him!!!!

Mico is about 4 months plus. He is been with me for a month. He has become a little bold and he tends to bite. The pet shop told me to spend more time with him so that he can know us better n he will stop bitting. Pls give me your comments.

William- Getting to know and trust you will probably calm him down somewhat as bunnies often bite because they feel threatened. He is also at an age where bunny hormones can act up so that is probably playing a part as well. Do you plan on having Mico neutered?

William, I believe that there is a Singapore House Rabbit Society that maybe able to help find a place that you can neuter your bunny.