Scared to let my guard down

I've been dating someone for the past month, he's been treating me & my daughter like queens. He goes out of his way to see us, he worries about her, always spoils her.. He's pretty much perfect. But I'm so scared to get attactched or to start develop feelings for him.. Due to what I went through in my past relationship I've been more paranoid about everyone. My ex messed me up to the point I was scared to even let a guy hug me.. I told the guy I'm dating about what I went through and he's been so sweet about it.. I'm just so scared to show any feelings around him cause I'm scared of going through another horrible break up :/ he's kissed me a couple of times and everytime he does i jump up and get kind of scared.. does this mean I'm not ready for a relationship? Should I end things? I don't know what to do :/