it means that you are his girlfrend
It would depend on who is using the term. Some people have open relationships but still consider the individual to be their lover (girlfriend or boyfriend).
Of course he loves her. When a guy says he would date you if he didn't already have a girlfriend, he is letting you know that he does love her and that is why he isn't dating you or anyone else. He is telling you that if he didn't have her as a girlfriend that he may consider dating you.
if by they you mean THE GRUE!!...then yes, they do have a girlfriend
I have a girlfriend
It could mean that he is not fully committed to his current relationship or that he is unfaithful. It's important to communicate your boundaries and consider the ethics of pursuing a romantic connection with someone who is already in a relationship.
When a guy says he would date you if he didn't have a girlfriend, he is being nice and letting you know that he is already taken and that you would be someone that he would consider dating if he wasn't already with someone else.
It means he likes but has a girlfriend.
First off who is Nina and what do you mean by girlfriend
Not necessarily. His actions could simply mean that he is being polite and friendly. It's important to consider the context of the situation and his overall behavior towards both you and his girlfriend before jumping to conclusions about his intentions.
Selena Gomez
it means you do not trust your girlfriend.
stress