You know, this is tricky. We live in an era where you can be extremely close to somebody you have never met. Technology has come so far and enables us to interact through phone, texting, and even video.
A big part of a relationship is conversation, emotions, caring and even love. These are all things you can actually achieve without being with someone face to face. It does take an enormous amount of trust and faith in the person to consider them a girlfriend or boyfriend if you have never met. I do think however, that being with someone in person, touching them and spending time together are also important things that help validate a relationship. To have a healthy functioning relationship, you really need to be able to communicate in all ways and touching, kissing, even just the sense of being in a close space together are all things that shouldn't be overlooked.