promoting main plate to ltr

I have been seeing/talking to this girl for a few months now. The sex is awesome, she is submissive and obsessed with me, affectionate, cooks and cleans, raised in a strong classic family, we vibe great. I was spinning plates for a while before and into meeting her but stopped as we begun to hangout more and she mentioned being exclusive with the sex and I agreed since we vibe so well and I don’t want to hurt her.

I’d like to promote this girl to an LTR. I like her, and she genuinely seems like a good girl. Is it better to ask directly to take the relationship to the next step, or wait for her to bring it up? Knowing how she is, I believe she is waiting for me to bring it up because of the dynamic we have. My school is entering break for a while, and if we aren’t fully together I think she might think i’m just not into her (last girl I was seeing was waiting for me to ask her, but I never did and I moved on. She told me this a few weeks later) and find someone else if we see each other less which is fine if she wants to, that’s her choice and I have plates on my side. If I wait until she potentially brings it up during break, it would be better for my frame and not appearing desperate, but again she is probably waiting for me to ask and I want to make the right move. We live an hour apart during break so we would see each other 2-4 days every 1-2 weeks which is totally fine, preferably better with me. thanks homies