[Eternal]

I think its a good idea as well
If you really want it for the rest of your life and it has meaning (which it does), then I say go for it!
My advice is don't psych yourself out before you get it done. Tattoos are made to look like they hurt a lot in movies and such, but it really isn't too bad depending on what part of your body you get it done on. I don't think your collar bone will be too painful, but pain tolerance is different for everyone.
The pain is only temporary for an awesome design that's with you forever. Its definitely worth it