Thanks for responses all. I have a history of depression and anxiety. I still do but not as much as I did. I still have zero confidence though.

I am friends with many girls my age now (none single though - few of those seem to exist), I no longer have trouble communicating with them.

As for socialising, my interests are mainly computers and science. I don't spend a lot of time with friends, but I have a couple of social events I attend on a montly basis where there are some people of both sexes, both around my age and older. Although I am still somewhat shy in large groups.

Thanks.