Welcome to the forums!
It sounds to me like you are poly since you can see yourself loving more than one person at a time.
You are right that standard monogamous culture is ok with half-truths, lies by omission, and "little white lies" as part of a relationship. However, some monogamous people are starting to learn about polyamory just for the communication and relationship advise that is useful for them. (For example, a woman may be jealous of her husband looking at hot women in porn and feel jealousy. Polyamory advise tries to deal with the source of the jealousy like insecurity instead of the sympton by throwing away the porn.)