A Terribly Unreliable Companion
Because we frequently bring the baggage of our previous experiences and different expectations into new romantic partnerships, it is critical that we have open and honest conversations about what we want from a partner as well as what we do not want from them. The majority of individuals do not take kindly to those who are possessive or needy.
However, being needy is not an acceptable reason to cheat, and we highly doubt that their lover considers himself to be “technically single,” as the poster appears to believe he is. If this is how he’s treated in the relationship, it’s not unexpected that he’s needy and insecure as a result of it.