Should i be worried about my sister dating at 12?

I am 15 and I have a sis that's 12. i think she is having this sort of SECRET relationship with this guy at school (meaning-not telling parents). They aren't dating or having sex or what ever but is it right for her to start this 'so called' relationship...

yet? Well i see girls and boys her age dating and kissing(sometimes i even see them PASH), but is it appropriate, safe, will she be influenced by people and start to party-HARD or start to disobey our parents, and could the rest of her life be nothing but misery? i need advice coz i don't wanna see my sis suffer.

It's hard to say what she may end up doing as she is an individual and makes her own choices. You are her big sis and if your parents were not around it would be your responsibility to watch out for her and look after her. You should have a heart to heart talk with her and tell her how you feel and what your concerns are. It doesn't necessarily have to end up bad especially if you step up to her as caring big sis. Don't bully or threaten her though, as this might bring about conflict between the two of you. Respect her and trust that she will make the right choices after your talk.

Every young person goes through the relationship phase where they start wanting to be with a guy.. there isn't much you can do, because if you tell her its bad at that age she will want to do it more... so you will just have to let her live and learn... and be there for her... ask to hang out with her and stuff...