I've wondered if I have this problem. I can stay in a relationship no problem, but I find reasons not to commit fully. What I mean by that is, I'll make plans alone and go forth with my life as if alone. However, mine stems from my dad being a serial cheater and I've caught boyfriends cheating... so I just don't commit 100%, when it comes to my future plans.

I wish I can say that finding the right person will rid you of your fears... it may or may not. I'm currently in a relationship with what I believe to be the most amazing human being. But I'm putting up road blocks. I think the best way to approach it is to figure out where the fear is coming from and see if you can actively work on seeing if your fears and doubts are valid. I'm currently in therapy to work on a lot of parts of my life and this is one of them.

It's rough going through this type of anxiety. I hope you figure this out.