It’s not wrong; since you’re not tied down, you’re simply screening a list of potential candidates.
It could also be that you’re having fun, and taking a break from dating, but still want people to do things with. Casual dating doesn’t mean you have to sleep with everyone you talk to.
Hopefully that dating and boyfriend meaning is clear... If I understand correctly, he had a committed girlfriend/boyfriend relationship, but had sex with a different girl. This is only "okay" if it was agreed upon in advance that having sex with other people was okay. if an American invites you to "Netflix and Chill"...
[Read: 8 subtle signs your casual fling is turning into a relationship] Relationship If you’re already in love, but just want to feel reassured that the feeling is mutual and everything’s just dandy in loveland, look for these subtle signs in your romance. If you two lovebirds had the whole “we should be an item,” conversation, then things are pretty clear.
The reason you’re reading this article is either because your partner forgot about the conversation, or you’re having a terrible time.
If there was more to it—something serious—there would have been a discussion.
[Read: 16 signs you’re not yet ready for a serious relationship] #2 Odds are, there’s more than one person.