Hello Sabrina,
I know exactly how you feel, ( or don't feel. ) Many of us do. You are not alone in that and it's not fair of those who expect you to just get over it, to expect that of you.
People who haven't been through such traumatic experiences can't understand what it's like, simply because of that fact. They've never experienced it. However, they should try to be understanding about it if they care about you. Just be patient and try to explain how you feel to them. That's all you can do.
I've recently had to quit my job because it was causing me to have flashbacks and panic attacks, and I was living with my boyfriend and his mom and she just up and kicked me out because of it. I explained to her to the best of my ability, while sobbing from what I had gone through, what it felt like and she told me that it was just an excuse and all in my head and I need to get over it.
It was hard to forgive her for that, but I understand that she doesn't get it. Be strong. You don't owe anyone anything and in time they'll either understand that it's a serious deal or they wont. Either way, you'll be okay.
About the emotionless part, I understand that too. I've been struggling with it a lot, as well. The thing that helps me the most is to just get a good cry out and then watch a funny movie, clip, whatever. Something to make me laugh.. and even though it's just a moment of feelings it helps to feel better about myself.
Remember, you're not broken and you're still the same you as you were when you were younger. Things happened to you that were out of your control and in time, you'll find your way back to where you once were. It's just going to take time, for all of us.
-Hang in there.