Is my feelings platonically or not

Heyy, Idk if its a mistake asking questions on mangago. But im just desperate and needed an advice for my situation, OkAY SO LISTEN

So i met this girl online. Where we could send letters to each other, yes its letters not text but letters. We got to known in each other in a week and then i dont know what just happen in a span of 2 weeks i guess? Shes been hinting at me that she likes me and stuff and i said to myself "fuck why not" and confessed to her, At the time i know its crush and stuff, I felt happy when she likes me back and now idk if we're dating now or jjust, and im not sure how i feel now, whether i like her platonically or romantically. Like how do i even know if you like someone platonically??!? Like can yall give me some examples, and how do i know if im in love with them and genuinely like them as a person. Now shes kind of waiting for my letters, And I havent replied yet. I don't want to play with her feelings if all of this stuff between me and her is just platonic from the very start.

Im sorry if this confusingg jshsjd

Like is there any signs that i must have to know if i dont like them?

PlS givE me SignS, Im unaware and dont know what is my feelings


Ill answer back if you have any questionss, pLs For EveryOne who has Experience with this kind of stuff, Its my first time 'liking' someone and they actually like me back.