I've known my girlfriend for almost a year now and we've been dating for 2 months. Before we were dating we would talk on a daily basis and cuz of that we're good friends. helping each other out on our various small issues or giving each other our valued opinions. Now that we're dating however it feels as though the behaviors of my partner has age regressed tremendously. She struggles badly to communicate often choosing to remain silent and say nothing to questions. (Previously she'd give in depth responses now she just settles with "i don't know" or shrugs). While her autism and adhd isn't really an issue her anxiety is seriously hurting me. She described her anxiety as "knowing what to say, wanting to say it but nothing comes out."
She consistently avoids eye contact with me and it comes off as if shes scared of me, her body language fluctuates from extremely closed to extremely cuddly (still no eye contact). During sex she hides her face and covers her mouth so I don't see her face or hear her moan or just ostriches her way into the sheets/pillows.

Alot of her body language and actions make it seem as though shes uncomfortable and I can never really tell if shes actually uncomfortable or not with her anxiety, nor is there anything I can really do to help her according to her. We've already had several conversations about what I can do to make her more comfortable with me enough to where she can actually look me in the eye but all it did was feed more into her insecurities. She says she hates her anxiety and its always screwing her over. She says she is scared of me but "i'm scary in a good way" and I genuinely have no clue what that means.

Theres this thing she does where she won't mention anything she likes or wants to do and will wait for me to say it for her, for example she'll call my name then stare at my head (not in my eyes but at my mouth or neck or chest as she says its less scary to look at me there) and wait for me to come up with things to do with her. Sometimes she'll say "ur free time is mine" then stare at my head to decide what we do together. Usually I just list off things and she'll say no to each of them until its the thing she wanted to do with me in the first place that she says her anxiety won't let her ask directly. she also initiates sex in a strange way but only because I asked her to start initiating things instead of her having me go down on her constantly. (so i don't feel like im using her even though shes asked me to do exactly that) and she does this thing where she calls my name and says "im horny" then stares at my head till I do something again. This girl confuses my braian, she'll randomly flash me/send me nudes but struggles to look me in the eye?

Enough of the sexual aspect of it i'll talk about the platonic aspect now, our conversations tend to be all over the place and lack any real structure which i don't mind at all, I know how autism goes and waking up to 3am to a random text about her lamp collection and hyperfixation on arctic monkeys brightens my day a little. Its (one of the reasons) why I still continue to date her, its just that her anxious behaviors make me feel like im dating an 11 year old girl? I know for a fact shes 19 i've seen both her ID and birth certificate but it feels like im dating someone at the social level of an 11 year old with her style of communication. She says that usually people find her behavior cute but I just find it deeply disturbing as i've never dated someone that acted like this without them being deeply uncomfortable. It feels as though shes trying to be submissive but it comes off as incompetent and childish. I don't feel stimulated by this dynamic and I miss having deep conversations with her where she wasn't this anxious around me.