It's easy to say this, but first of all, try and pay little attention to any pressure. In most situations you can only go with what you want to make yourself happy. If getting a girlfriend will make people around you happy but not you, there really isn't much point.
I've never really been pressured by anyone around me, although I do relate with a lot of what you've said. I can't deal with someone else most of the time, I'm awful at empathy and I have no desire to socialise with most people.
That said, I did somehow find myself in a relationship via the internet a couple of years ago when I was 22. It was long distance, so it kind of worked out well for the not having to deal with someone constantly as we were only together something like one week in every month at most. And at the time, it did feel like the greatest thing in the world. I cared about someone (I won't go as far as loved) and they cared about me and it was full of new experiences for me.
Of course it all fell apart after a few months after for a bunch of reasons, most of them seeming to be thanks to my personality. At the time that felt awful, but now I'm fine with it, as I probably would have gone insane spending a long period with her anyway. My first reaction was to try and find someone else to get that good feeling back, but that passed and now I'm actually pretty happy in not having any relationship. That isn't to say I'd avoid one. If I was in the right time and place and the right person seemed to be there, I'd welcome it, if only for the companionship more than anything else, but I'm comfortable with who I am enough to not actively look or mind one way or the other.
I know you wanted advice and I've ended up giving you a chunk of my life story, but it might offer something, I don't know.
Just do whatever you are comfortable with, other people be damned.