Can you speak to potential spouse in Ramadan?

I’ve been speaking consistently with someone who I want to get married to, and now it is Ramadan he has stopped even opening my messages. Our chats are not flirtatious at all, very professional and friendly at best. Is it not permissible to talk to the opposite gender (who you have romantic feelings for such as in this specific situation) during Ramadan, even if the conversations are platonic in nature?