Relationship advice PLEASE

So about a week ago I started dating this girl that I have liked for months. We have been friends for years and I felt like she was absolutely perfect. The first few days I loved talking to her, but now I’m struggling. She’s so affectionate and super sweet but I’m continuing to second guess stuff. I’ve liked her for months but I’m just having so many thoughts like “do you actually want to be with her”, “what if you’re just faking this”. I was wondering if anyone else had experienced some of these anxiety ridden thoughts and if they had any advice for me. Anything would be greatly appreciated. Thank you so much. (Also I’m not going to see her for 6 weeks so long distance is making this a little harder also)