My girlfriend, who is 18, never takes the initiative in our relationship.

My girlfriend and I have been together for about six months, but she rarely takes the initiative when it comes to things like kissing, hugging, or even asking to spend time together. This is confusing to me, especially since she often gives me gifts and calls almost every night to chat. I’ve mentioned several times that I’d like her to take the lead occasionally, as it would indicate that she’s genuinely interested. We’ve had two in-depth conversations about it—two months ago and again last week—during which she admitted she tends to overthink these situations. I feel like she should have made some progress by now, especially since I constantly reassure her that I would never judge her and that I still make the first move. The only time she has asked me out was to an amusement park she was already planning to visit. I’m starting to wonder if she’s not physically attracted to me, as she’s never shared what she finds appealing about me, apart from calling me handsome when I directly asked her. Whenever I bring this up, she tends to avoid the topic and doesn’t offer anything that might improve the situation. After getting frustrated with the silence for about 20 minutes, she tends to agree with whatever I suggest. How should I approach this situation?