It's completely understandable. I've been a single parent for so many years, and it's hard. My kids tell me often how they want a dad (he passed away, and they never got to know him) and I admit there are many times when I could use the help! :help
I have cried out to God as well, because sometimes it is just so hard trying to do everything, and bear all the responsibilities in my small, but blessfully sweet household. I don't know what God has in store for me or what He may have in store for you, but.....
All I can do is wait on the Lord, and that's all you can do too. Just as Bones said, and I've heard the same thing from so many ex-singles. God seems to bring someone when you stop looking, and let Him bring you together with whomever he chooses. Put Him first and commit to serving Him. Being faithful to God's plan for your life will never steer you wrong.