I am struggling with this right now too.
I think for me a lot of it is that I trust myself, but I don't trust myself around other people. I am still on a roller coaster in terms of healing from my relationship with an alcoholic, and other betrayals.
Though I would like to meet others I know I need to be looking for something different then what I have previously done.
In other words the old is not working any more, but I don't have a new skill set and trust in place.
I am sure I am sending out that vibe to the world and that unconsciously I am self-fulfilling prophecy.
I suspect when I am further healed this might be easier, not easy, but easier.