Sometimes, committed relationships lead to marriage. Sometimes, they break-up realizing that they can't see growing old together.
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"...
Even though both of these involve two particular persons yet there is a difference between them.
This difference between dating and relationship can be subtle. A relationship is basically a bond or connection between two individuals of the same gender or opposite gender.
Relationships are developed when the two persons involved are in constant communication.
There is no confusion in the relationship status when two persons are in a relationship, if one person still considers it as a date and other one considers it as relationship then it is definitely not a relationship because only one person is serious and other is not. Expectations: When there is no commitment then there are no expectations at all.
As some couples use these words, relationship and dating over and over without a distinction, some would consider the two as synonyms.
Even though the two words, relationship and dating, involve two particular persons, these two terms cannot be more different from each other.
The sole purpose behind dating is to know whether a particular person would be a perfect partner or not.
Dating often results in a ‘romantic’ relationship between two individuals.