Dismal purple said:
Humm... since you ask, 29 yo male here.
I think I had my first (romantic) kiss at 26, my first sexual relationship shortly after (was a complete mess btw), most of my cousins round my age had kids before that. Met some people I liked before that, just didn't worked out.
I actually find it almost impossible to believe you have never met someone that you liked or that liked you, that would almost always indicate a neurological or endocrine unbalance, but yeah... I had a similar feeling at 24. Studied math, was always over thinking and making stupid choices regarding emotions, when in fact it's kinda easy for me now.
As for caring? I used to care as a teenager, then got focused and didn't cared that much. "The one" is quite a dangerous concept btw, well, at least the way it's used on the western culture; as for youth, SQUEEZE THE HECK OUT OF IT, but again, don't follow preconceived ideas, go do stuff you like, go take risk and do things that scare you but you desire, learn, but if you don't want to club or party then don't IMO.
For insight I would repeat what I told you, learn to follow your desires more and allow yourself to make mistakes both in relationships and especially outside of them, just be ready for it if shit hits the fan. In my experience when you follow your heart and do stuff you are passionate about good girls just come to you.
The GF question is a bit more complicated, I think my first GF was a skype relationship at 27 which had little to do with sex (by then I had some sexual experience, but I really like this skype girl), outside that I was the BF of a girl last year, not many "oficial" GFs in my life. Did it mattered? Yeah, but it wasn't the concept of GF, but because I really like this girl and spend good times sharing with her.
Nowadays I kind of regret not getting closer to some cute girls I had something going on when younger, but... you see I needed that time to grow, at the moment I am VERY pleased with my love life, having an open relationship with a girl I love (which incidentally was the first girl I was ever with) but seeing her way too little, around once a week, which makes things more special BTW, I am also in intermittent relationships with some other girls, which know that I am just their lover. But more than anything I am finally mature enough to handle sex and love towards what I want, to be honest, caring when needed but detached when called for, and especially to finally be able to see with which girls there is a wonderful surprise in wait and build it together and which ones I shouldn't go for.
It has been long, sometimes painful, heck lonely at moments, road but I am actually happy with the man I turned out to be.
Anyway, GL! If you want a conversation, just quote me or pm me
PD. I would disagree with most of the post round, having relationships (sexual and emotional) does radically change your life, for the better if you are lucky or know your way around.