You were 14.

Fourteen is a child. Even if you acted like you were eighteen, dressed and made up to match, and think you 'initiated' it you didn't really, because children are not able to give proper informed consent.

Fourteen year olds might flirt and pretend to be grown up, that is all perfectly normal and part of becoming aware of sexuality - but it is the responsibility of the adult you are with to recognize that for what it is and not encourage it, and certainly not exploit you.