What's the point in self improvement when you are alone?

I feel better when I have someone in my life that I can depend on. I can surive being alone, but much of what I want in life depends on my close relationships. I could travel to other side of the world, but what is the point when I have no one to share it with? I am 100% certain that I want a family someday, but I am no closer to reaching that goal the more I am alone. This has heavily impacted my career ambitions. I have noticed that whenever I had a partner, I accomplished many milestones in school and my job. Having someone to lean on was always a tremendous help in gaining the motivation and discipline to keep achieving and putting myself ahead.

I feel an empty void that I cannot fill which keeps me from taking risks and pursing career goals. I just don't know how to circumvent this problem. I try not to worry about the things that I have no control over, but when all I can think about are the relationships that I lack, it's impossible to find any point or motivation to keep trying new things and pursing life goals.

I'm necessarily depressed, I just lack direction. I don't see the point in furthering myself when relationships are my main motivator. I want to be a provider. I want to care about someone. I've been feeling bored and lifeless for the past few years. I'm dating on and off, but so far I find people to be more annoying or too different to feel much romantic interest. It makes me wonder if there's something seriously wrong with me and who I am as a person when I'd rather be alone, yet desire more than anything to be with someone. At what point do I settle for someone and hope that it grows into something more? I have time on my side, as I'm turning 30 next year, but it doesn't necessarily make me feel any better because I feel that this should be the time when my career goals and ambitions should be taking off. Yes, I have a job and can pay the bills, but I don't care about it and I'm too uncertain about everything to take risks and try something else. I don't have any direction because I don't have anyone in my life that I can come to ask for support or people that I truly care about. I'm not really motivated by being wealthy and there aren't any causes that speak to my soul. But I don't want to become a robot by doing the same job year after year because I honestly don't care that much about it. I don't know what to care about.