I'd advise all young women and men to experiment with both sexes before they commit to one specific sex style.
We might say you are heteroflexible. Congratulations!
I'd suggest you stop talking about your desires to be sexual with a woman and just do it.
Continue to enjoy your idea of threesomes and at some point, a woman will appear who satisfies both of your requirements.
Bisexuality is a stable sexual orientation and that bisexuals are as likely as lesbian or heterosexual women to commit to long-term relationships.
Sexual orientation is very complex and doesn't happen or change "over night."
We all have a bisexual component in our sexual make-up.