Might it be a good time to have a break from relationships?
I know if I had the opportunity I might go on a meditation retreat for a few weeks.
Possibly you need to build up your self-esteem, through following your passions. I know mine is music as I try to improve my guitar skills. Also I do a public speaking course.
The thought of us being alone, without a partner can be scary I admit. But if we can learn to be happy alone, then we bring that happiness to a relationship. Expecting a partner to make you happy can create problems, in my view.