Do you know what stoicism is? It is bearing the pain of the world with a blah look upon your face. Most guys don't cry or admit to it at least, lest they look like little school girls and get teased on the playground. That being said, it is quite healthy to let it all out sometimes. But if you are feeling a deep gut pain, then you are effected by it. If you don't feel like you need to cry, don't, just talk to someone you know and trust, and maybe they can help you sort it all out. (I don't know if you personally know or should trust anyone on here as your mending crutch, but eh worth a shot though right?)
Also, you said you weren't as close to this family member, so it wouldn't make sense for you to break down balling over it. But some people or more sensitive or empathetic than others. Now in my case, I just lost my mom a few months ago, and although I am not physically sad over it anymore, as I know theres not a damn thing I can do, every day I reply imagages of her passing in my head. Makes it kind of hard to sleep as you can imagine... but time is the healer of all wounds. Oh yeah, and I got layed off from work while she was dying and am still off work... horray. So yeah, I don't know what else to tell you other than this:
Dying is easy.. is the living part that is hard.
Especially living with someone that has died.. i don't think there is a worse pain (short of breakups when you're both throwing $hit so hard it embeds in the Sheetrock)