I'm 30 and still single. You can learn a lot about godliness from marriage, but you are also more free to be a minister for God if you are single. I mean that being single allows one more time to spend with the lost, hurting, and broken and where as having a family takes time away from that.
Pray that God will show you who to marry one day, but don't let that be your main prayer. Ask God to show you what to do with the time you are given right now, being single.
God bless you!