30M falling in love with this girl I work with

For context she is 24 and speaks only Spanish. My Spanish is good but not great. About a month and a half ago I told her I liked her and she said she only wanted to be friends and that she wants to be single. About a week after that she invited me to eat at a restaurant. I didn’t think anything of it, but I was excited to be able to see her outside of work. We continued to see each other every weekend since. There was one weekend where she even got a bit tipsy and let me kiss her and she kissed me back. We even kissed each other again the next day at my place. Except, that was the last time I kissed her. This was about 2 weeks ago and now she has been a bit distant. She still texts me and we still went out this past weekend, but she feels a bit more dry with me. Almost like I had a chance with her and then I blew it. I’m not really sure if I did anything wrong.

The only thing I can think of is that she really just wants to be single and she was opening up to me quickly. It could also be the age difference and that she wants to go out more and drink, where I want to get married and have a family. I really want to open up to her and ask her to be my girlfriend because it seems like she wants to be with someone who takes initiative. I’m afraid if I do that, it could potentially push her away. Should I give her space or tell her how I really feel?

I have been single my entire adult life and she is the first girl I have ever kissed and I don’t want to rush or ruin anything.