Don't give up, 33 is still young. I felt much the same as you do. But, when I was 40 I found someone that loves me for who I am, even with all of my 'problems'; Asperger's, depression, OCD.

We have now been together 20 years, have beautiful children and are still very much in love.

Sometimes we just have to wait for that right person to come along...and I do believe that there is a person out there for everyone.
As I said, don't give up. You may meet the perfect person for you tomorrow, or it may be a few more years...but, in my opinion, it's worth the wait.