stop dating him/her and apologize to the parents immediately
i don't think age really matters. as long as you still really like him/her it's okay.
can social services be called if a 16 year old is dating an 18 year old?
No but the parents of the 15 year old can
I'm 17 and I am dating a 15 year old girl. I don't think that there is anything wrong with it.
illegal
None unless they have sex. There are no laws for dating.
Dating is not illegal. Having sex would be illegal.
There are no laws about dating. There are laws about sexual contact and getting married, but not dating.
YES!
Date. There are no laws about dating. There are laws about sexual contact and getting married, but not dating.
Considering there are no dating laws - it's fine, but this depends upon the parents. It's not usual for a 11 year old and 15 year old to be dating.
no country has an age for "dating" so its not illegal as long as there is no sexual activities.