How to stop being afraid of relationshipsWatch this thread
That said you've had a few contacts - and lived to tell the tale. When you are ready to have a relationship you will know. You will also live to tell that tale.
It is just the same in relationships - you have to ask what is it that you are so afraid of? Being ridiculed for something? Being rejected?
How did you learn to sabotage relationships? What family dynamics were there growing up (or lack of them) for you to imitate that behaviour?
If you accept you might be single forever you might become accepting of the fact and become uncompromising in the way you respond to others. You will gain a friend when you least expect it