When I was single I felt the same way. I felt lonely. I felt like I was missing out. I felt unwanted. I've been married for a 18 years. Now I look back on my single years, I wish that I had been able to be happy in the moment. I wish that I had seen my singlehood as a phase in my life that I could enjoy and make the most of. My (unsolicited) advice to anyone who is single is to enjoy it. I can't tell you what that means for you though, happiness is different for everyone. The time you spend wishing to not be single is time wasted.