Have you done any introspection or analysis on why you think you haven't met anyone? To date for 4 years and looking means you must have some insight on what hasn't worked, or what reasons you've been given by dates for things not progressing?
I completely understand wanting to meet someone, and how lonely it can feel. But I also think there are always things you can do or not do to increase your chances of meeting someone, and I don't mean just dating or living your best life. I mean, really understanding negative patterns in your dating interactions, how others perceive you, or whether you don't understand yourself well enough to know who would be a good fit. As an example, I have a long term single friend who is beautiful, successful, has a great life, lots of hobbies etc - I've never understood why she hadn't met anyone. So I set her up with a single, colleague of mine who she had always fancied, and on paper they seemed a great match. However, after they had been on a few dates he decided not to continue, and told me that she was quite irritable and impatient. It's not something I'd never noticed in her myself, but after he commented I did start seeing it - she had a very low tolerance for anything that wasn't to her standard and could get quite snappy. As a mate, it never bothered me, but I can see why someone would not want to live with that behaviour. Point being, that sometimes it pays to really be honest with your less than desirable traits and consider how it might come across to a potential life partner. Incidentally, after I conveyed what he'd said, she was more aware of it, and has ended up with a very different man than she envisaged. Her current partner is a very laid back, type B person who doesn't mind her perfectionism whereas she traditionally went for guys just like her (also she doesn't hold him to the same exacting standard she held other men).
Another example is of a colleague who after a lot of therapy realised she had a real issue being vulnerable with a partner. And put on this shield of never showing she was upset, or hurt, or in any way affected by something a man did. She thought it made her come across strong, cool and as someone not to be messed around with. However, emotionally healthy guys thought she was just too cold and disinterested in them, and the arseholes saw it as a challenge to break down her defences.
So, just to say, that just like with everything else in life, if something isn't working it's good to consider why, or what you can actively do to change it. Dating is tough for sure, and also a numbers game - but understanding yourself better makes it easier to be happy with someone best suited for you, than chasing someone who isn't.