I Need Advice On My Relationship

Ok, so there's this girl that I really like and whom I have taken out on a date before. I like everything about her and I'd love to continue dating her, but there's one slight problem. I'm starting to get this feeling like I'm coming across like a boring person to her. It's just that, I struggle to carry on a conversation sometimes, there's that awkward pause and I'm not sure what to do. And the funny thing is, it only happens with her. With everyone else, I can carry on a conversation easy, but with her I dunno.. It's frustrating really... Like I said, she means a lot to me and I'd love to keep dating her, but do any of you have advice about this "talking" issue for lack of a better term?
Any advice will be helpful.

Oh, also, ditching her isn't an option so I'm looking on advice to help the situation not make it worse, lol.. Thanks!:)