NO, this is not a proper relationship and will fall foul of child abuse laws. This could be very dangerous for a 15 year old. Most people would say that an 18 year old and 30 year old should not date. There is a big difference in maturity in these two age groups. Your parents can charge him for Stagitory Rape an put him behind bars for 25 years life. I would wait till your 18 cause then your an adult and should know what you can and cant do with a 30 year old. Have you ever crashed a wedding or had your wedding crashed, if so what happened?