Actually I can't really relate to what you're saying. I've been married almost 30 years and have two grown children. I love being a wife and a mother, BUT that doesn't mean it's meant for everyone.
God has given you unique gifts and talents, and since you're single, you can devote your time to them.
What I suggest you do, is to pray and fast. Seek out His will for your life and ask Him to show you where He'd like you to be, and how He'd like to use you for His glory.
Many blessings to you,
Jeremiah 31:16-17 "Thus says the LORD: Refrain your voice from weeping, and your eyes from tears; for your work (raising of your children, prayer) shall be rewarded, says the LORD, and they (your children) shall come back from the land of the enemy.