I am happiest being single, I absolutely love it. I can compare; I was married for almost 20 years; they were very lonely years towards the end of my marriage.
I have now been single for 21 years. I have done amazing jobs in the past, travelled the world, met all sorts of people and had many experiences I wouldn't have had being married, I've even lived abroad. I have never lacked friends wherever I've lived, always found 'communities' to be part of, whether it's a workplace group, interest group, village community, church, whatever....
I don't "miss hugs" as pp have said, I still get hugs from family members, friends, even in the workplace. But then I'm not really a 'huggy' person so it doesn't bother me, and I really like my own company. As a single person I feel more content, less stressed, and with a better 'life balance' somehow. I look forward to the future with contentment, I'm not worried about being retired or old on my own....I have so many things I still want to do.
I have both male and female friends, but I am definitely NOT looking for another relationship in my life. I truly believe I'm happiest single, I like the fact that I can do whatever I want without having to consider another person nor make compromises, I just don't want to give up the freedom that I enjoy now. I just wouldn't give that up for anyone!