I understand it's normal to want to be in a relationship, but how do you feel happy when you aren't?
I'm 36, and while my love life has been varied and interesting, over the last few years I've started to want to settle down. I know it doesn't happen overnight. But recently it's been weighing on me more and more. I reminisce about past relationships. I feel hopeless about meeting someone in the future who shares my values.
On the one hand you hear things like "happiness comes from within", but on the other we are social animals and 99% of us want to feel loved and to love.
I think, by that age, the pressure to settle down in a relationship and eventually a family is very much due to social expectation. Peer pressure by proxy, because many people around you, including your friends of similar ages, have probably settled down and/or become parents and it makes you feel like you have to follow suit. I've experienced similar pressure never really acknowledged it as something I wanted, but rather something I felt was expected of someone my age.
Also as others have pointed out on here, work life gets in the way and leaves you too exhausted to be social. Just remember there's also people of all ages out there still looking for a reason to leave their lives of late nights out with mates behind. Sometimes having too much time on your hands can be a curse, it's all about striking a balance somewhere between work life and social life and it's not particularly easy. Either way, your social life is eventually prone to some kind of decline and a desire for something different, and that's the point where it should become clear what you truly want to do.
Simply put: Don't rush yourself, there's loads more time left on the clock to have your fun and figure out what you think is best for you. I'm not suggesting to NOT settle down since that's what you seem to want, but don't feel disappointed in yourself if you find it difficult to balance the want for settling down with the want for a social life. Go with what the heart wants while the option is still there, because one day that option may not be an option at all.