It is alright to date a person,as long as it is not intimate,in a sexual way,which would include kissing,because that would be a source of temptation on their part,which God did not say you can steal a piece of bubblegum,but do not steal a car.If a couple is not married,they should have no intimate contact at all.
Could they hold hands would seem harmless to some people,but I believe they could not even hold hands,for that is not 2 people on a date,but that suggests more of an intimate nature between them.No intimacy whatever that is outside of 2 people only enjoying each others company,and conservation.Anything else beside that is them getting close to each other in a way they should not do.
But dating,within the boundaries of the Bible,whether the intention is wanting to get to know each other for possible marriage,or only wanting to hang around each other,would be okay,and you have to date someone,and hang around them,if you are wanting to know someone that you are interested in marrying,because you have to get to know them first.
So can you actually have a girlfriend,or boyfriend,at all,which it would seem like seeing there is no intimacy,that you could not say that,because then they are only friends,although close friends,but you could say you are engaged to the person.
It would appear that there is no such thing as a girlfriend,or boyfriend,to a Christian,because if there is no intimacy whatsoever,they would only be close friends at best,for they would only conduct themselves like friends,at best.
I do not know if the term girl,or boyfriend,in actuality,could apply.Is there such a thing,when at best they would only be friends,although they like to hang around that person,but I do not think they could label themselves that,for their conduct with that person,should be the same as all people they hang around with,nothing different.
I do not believe they can label themselves that,for to label themselves that would apply,that there is something different between them,than with other people,which if they are not married,their relationship should be the same with all people.