I was 28 when my wife and I met and turned 29 within weeks of our first date. I just wasn't ready for a relationship prior to that. The best advice I can give you or anyone is to focus on getting you ready for a relationship. Identify your strengths and weaknesses, know who you are, know what you bring to a relationship and have a positive self-image. If you don't love yourself, then how can you ask anyone else to love you.
Also, their is some truth to the adage, "God helps those who help themselves"
Regardless of your religious beliefs, the point is, you can't just sit and wait for a spouse to fall in your lap. You need to make an effort to meet people, whether that be through Church, social clubs, online dating, whatever you find that works for you. Most Aspie's struggle with social skills to some degree or another. You have to master these to some degree in order to date.
For example:
Can you go to a restaurant without experiencing sensory issues?
Can you maintain a relationship one-on -one or do you go off on tangents?
Could you listen to someone talk about something that has no interest for you?
Do you know how to make a friend and keep them as a friend?
These are the types of things you need to work on within yourself to prepare to meet someone you may want to someday marry.
Last but not least, cultivate a good friendship with someone of the opposite sex. They can offer great advice when you do find someone you want to date.