I just feel so horrible.

I feel so distant from my husband. We haven't even been married a year, but still, it's seems like he's sick of me already or something. I can't imagine what it's going to be like years from now. We're 20, by the way.
He used to cuddle with me, and sit with me, and was a lot more physical and hugged me, kissed me. Now, it seems like the only time he does it is when he wants to have sex. It makes me feel used.
I feel like I'm the only one that wants to be close.. even when not having sex. I come hug him or something and sometimes, he doesn't even respond, he'll just stand there until I'm done hugging him. Or he'll pull away because he's doing something or has to do something.
I feel soo horrible because of this.
I already have issues with sex because of how I was raised. I am pretty shy when it comes to my body, not to mention my low self esteem (I used to be overweight, so even though I only weigh 115lbs, I feel fat). Now, he's acting this way and I don't know what to do.
I try joking about it.. saying, "you only come cuddle with me when you want to have sex." Of course, he denies it.
He also doesn't talk to me.. I mean, we talk, but he never shares anything about himself with me. All we talk about is his job, sports, and anything I bring up.. and his response is always, "uh huh, yeah.ohh.. cool.."

Am I overreacting? Or are all guys/men like that?

I just feel soooo used. I like having sex, but it seems like it's always about him, and then I just lay there, feeling so used and unworthy.

What is wrong with us? Or is it just me?