How do I get emotions ? Help :[?!

I know it sounds strange, but i'm fifteen and I used to be extremely depressed to a point of suicide being a big option, but anyways i transitioned out of it, and now I'm never said, I'm never depressed, I never cry I am mostly upbeat and waht's not but It doesn't seem right that even when my sister was in the hospital for her body having a reject effect on Ectasy that I didn't feel anything.... It's like a went from being to close to my emotions to having them be a cross the universe.... It's not like i'm lifeless it's more like i'm plastic , or a Barbie < BUT IM A GUY hehe> I used to beable to cry so easily , now I feel like death won't even effect me and it just feels so disgusting....how do I come back and be more intouch with my emotions. ?