Is it normal to have doubts about your partner? ?

I wouldn't say it's not normal, but it's not a good sign. This means your experience of the person is more about yourself than the other--you don't know your own mind. It could be that you want to be in a relationship so badly that you are telling yourself this one could work, when in fact you are seeing reasons why it won't. Rather than make a decision and take action, you're trying to float along in the uncommitted middle.

Think it through.

Best of luck.

Of course it is, the worry means you have something you don't want to lose. If you're not worried then you're doing something wrong haha.

Not only is it "normal" (whatever that means), it's also completely typical and commonplace.