I go through phases, but clearly I like the idea of having friends but not the reality.
I ultimately find friendships complicated (or maybe the only two that I have are), I have no real desire to use my free time to meet new people, and I work remotely so I don't have the daily interaction.
It doesn't help that I've moved quite a bit, (moved the UK 16 years ago) and have worked remotely for the past 13, so I really haven't had the chance to meet anyone through work