This is a trivial issue.

In economics, there is a concept of "risk aversion".

So, you are extremely risk averse when it comes to romantic relationships. You are taking risk aversion to its logical extreme.

Being so risk averse the way you are DOES have its benefits: you will NOT get hurt.

It also has its downsides - you will never be happy (humans are social animals, so you cannot be happy just being alone since you are a human).

So you need to make a choice inside your mind and for yourself by answering this question: "Am I afraid of feeling hurt so much that I am ready to give up the only chance of being happy?"

Nobody can make that choice for you - it is your life and you get to decide how to live it.