15 .... 18 ....

Okay so I'm 15 and I go to acting group with a 18 year old boy. We've been getting really close for a long time and we are truthfully great friends and have a lot of trust and bond built up between us. I'm 16 soon but I don't know wether it's wrong because of the age gap? We have had sex however it was a MUTUAL decision and it naturally happened with no regrets. Is it still wrong?