What are the benefits of a relationship?

I am 23 and have never been in a relationship. All my friends are either engaged or in a serious relationship, therefore I pretty much am a lone wolf now. Not that I mind I'm independent and have many hobbies. So what is the point of a relationship? What's so special about it and what can I get out of one? Will getting into one mean that I'll have to give up some hobbies? I like hanggliding, motorcycles, soccer, mountain biking, sailing. None of my past female friends expressed any interest in those activities. Also will my job(pilot) affect the relationship? I am a honest man and would never cheat but all my colleagues who are also pilots are divorced because of accusations of cheating.