"One piece of advice I give people when this happens to them is to not judge yourself for feeling attracted to someone who isn't your partner," McCombs explains. "When you get into an internal judgment cycle about it, it can make it a bigger deal than it is. Most of the time, you can have a few fantasies and faps about that person and it will naturally diffuse over time."
But what if it doesn't?
Where does lust cross over to love?
So, you can't stop the feelings, you've started sending too many flirty emails, you just don't know how or don't want to stop. You are in a relationship but are actively falling for someone else.
Lorrae Bradbury, open-relationship pioneer, sexpert, and founder of Slutty Girl Problems, says love progresses in stages. "There's the new, lusty, infatuated feeling when you're first getting to know someone; the caring, tender feelings of wanting to commit, and the deep respect and dedication of long-term love."
When you are dating two people at the same time, your feelings still follow the same natural progression.