Confused, any other girls have this happen?

While getting solely a back mage I became to his touch on my spine in particular and ended up having an . I felt really embarred and think based on my tensing up, jerky leg motions at the end and breathing he could probably tell, although he said nothing. It was at a spa and I also don't think I should tell my boyfriend, but feel guilty of having had the pleasure without him. Should I tell him?